Fighting

There is considerable fighting among salmonid conspecifics during the reproductive stage of their life history. They make use of the elongated jaws and teeth that develop with maturation. Fighting may occur between different species when they come into contact.

The bite
Fighting over spawning rights with a female, a male Pink Salmon (Oncorhynchus gorbuscha) bites another.
Actinopterygii Alaska Barnes Creek Chordata Class Actinopterygii Humpback Salmon Infraclass Teleostei Neopterygii Oncorhynchus gorbuscha Pacific salmon Phylum Chordata Pink Salmon Running Bear Creek Salmonidae Salmoniformes Salmoninae South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate aggression chordate fighting male aggression male behavior near Cordova underwater
Attack!
A gravid female Pink Salmon (Oncorhynchus gorbuscha) charges into a conspecific female encroaching on the territory where she is digging a spawning redd in an intertidal stream.
Actinopterygii Alaska Chordata Class Actinopterygii Cordova Eccles Creek Humpback Salmon Infraclass Teleostei Neopterygii Oncorhynchus gorbuscha Pacific salmon Phylum Chordata Pink Salmon Prince William Sound Salmonidae Salmoniformes Salmoninae South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate aggression chordate female behavior femalefemale interaction fighting gravid salmon aggression salmon combat territoriality underwater
Alpha male competition
Competing to be alpha male, one male Coho Salmon (Oncorhynchus kisutch) bites another.
18mile Creek Actinopterygii Alaska Autumn Chordata Class Actinopterygii Coho Salmon Copper River Delta Infraclass Teleostei Neopterygii Oncorhynchus kisutch Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate aggression alpha male biosphere chordate competition fighting in situ naturalworld nature underwater underwaterphoto wild
Male Sockeye Salmon forcibly evicting a spawned out female
Male Sockeye Salmon (Oncorhynchus nerka) forcibly evicting a spawned out female from the redd she is guarding. Male salmon infrequently attack females.
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ naturalworld nature underwater underwaterphoto wild wild salmon
A female Pink Salmon defends her redd
A female Pink Salmon (Oncorhynchus gorbuscha) defends her redd from an encroaching Sockeye Salmon (O. nerka).
Actinopterygii Alaska Alaska wild salmon CRD Chordata Class Actinopterygii Copper River Delta Humpback Salmon Infraclass Teleostei Neopterygii Oncorhynchus gorbuscha Pacific salmon Phylum Chordata Pink Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate biosphere chordate female behavior guarding eggs in situ naturalworld nature redd defense spawning behavior underwater underwaterphoto wild wild salmon
A female Pink Salmon defends her redd
A female Pink Salmon (Oncorhynchus gorbuscha) defends her redd from an encroaching Sockeye Salmon (O. nerka).
Actinopterygii Alaska Alaska wild salmon CRD Chordata Class Actinopterygii Copper River Delta Humpback Salmon Infraclass Teleostei Neopterygii Oncorhynchus gorbuscha Pacific salmon Phylum Chordata Pink Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate biosphere chordate female behavior guarding eggs in situ naturalworld nature redd defense spawning behavior underwater underwaterphoto wild wild salmon
Female Sockeye Salmon biting another
A female Sockeye Salmon (Oncorhynchus nerka) bites another while a male observes.
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate biosphere chordate in situ naturalworld nature underwater underwaterphoto wild wild salmon
By the tail
An aggressive male Sockeye Salmon (Oncorhynchus nerka) is attempting to oust a competitor by biting his tail and towing him away from the female (at left).
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ naturalworld nature underwater underwaterphoto wild wild salmon
Fighting Coho Salmon males
Rival Coho Salmon (Oncorhynchus kisutch) alpha males.
Actinopterygii Alaska Alaska wild salmon Autumn Chordata Class Actinopterygii Coho Salmon Infraclass Teleostei Neopterygii Oncorhynchus kisutch Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ male aggression male behavior naturalworld nature threat posture underwater underwaterphoto wild wild salmon
Fighting Coho Salmon males
Rival Coho Salmon (Oncorhynchus kisutch) alpha males.
Actinopterygii Alaska Alaska wild salmon Autumn Chordata Class Actinopterygii Coho Salmon Infraclass Teleostei Neopterygii Oncorhynchus kisutch Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ naturalworld nature underwater underwaterphoto wild wild salmon
Fighting Coho Salmon males
Rival Coho Salmon (Oncorhynchus kisutch) alpha males.
Actinopterygii Alaska Alaska wild salmon Autumn Chordata Class Actinopterygii Coho Salmon Infraclass Teleostei Neopterygii Oncorhynchus kisutch Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ naturalworld nature underwater underwaterphoto wild wild salmon
Fighting Coho Salmon males
A male Coho Salmon a.k.a. Silver Salmon (Oncorhynchus kisutch) bites another for the right to be an alpha male in an Alaska, USA stream during the autumn.
Actinopterygii Alaska Alaska wild salmon Autumn Chordata Class Actinopterygii Coho Salmon Infraclass Teleostei Neopterygii Oncorhynchus kisutch Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ naturalworld nature threat posture underwater underwaterphoto wild wild salmon
Fighting Coho Salmon males
Rival Coho Salmon (Oncorhynchus kisutch) alpha males.
Actinopterygii Alaska Alaska wild salmon Autumn Chordata Class Actinopterygii Coho Salmon Infraclass Teleostei Neopterygii Oncorhynchus kisutch Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate aggression biosphere chordate female aggresision fighting in situ naturalworld nature underwater underwaterphoto wild wild salmon
Fighting Coho Salmon males
Rival Coho Salmon (Oncorhynchus kisutch) alpha males.
Actinopterygii Alaska Alaska wild salmon Autumn Chordata Class Actinopterygii Coho Salmon Infraclass Teleostei Neopterygii Oncorhynchus kisutch Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ male aggression male behavior naturalworld nature threat posture underwater underwaterphoto wild wild salmon
Fighting Coho Salmon males
Rival Coho Salmon (Oncorhynchus kisutch) alpha males with battle scars. Aspect Ratio = 2:3.
Actinopterygii Alaska Alaska wild salmon Autumn Chordata Class Actinopterygii Coho Salmon Infraclass Teleostei Neopterygii Oncorhynchus kisutch Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ male aggression male behavior naturalworld nature threat posture underwater underwaterphoto wild wild salmon
Pink Salmon female on female aggression
Pink Salmon (Oncorhynchus gorbuscha) female being attacked by another while attempting to dig a redd. Aspect ratio = 4:5.
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Humpback Salmon Infraclass Teleostei Neopterygii Oncorhynchus gorbuscha Pacific salmon Phylum Chordata Pink Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate aggression biosphere chordate female behavior femalefemale interaction underwater fighting in situ naturalworld nature spawning behavior threat posture underwater underwaterphoto wild wild salmon
Alpha male aggression
A Sockeye Salmon (Oncorhynchus nerka) alpha male attacks a challenger in an Alaska, USA stream during the summer.
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ naturalworld nature underwater underwaterphoto wild wild salmon
Fighting Pink Salmon males
Rival Pink Salmon (Oncorhynchus gorbuscha) alpha males.
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Humpback Salmon Infraclass Teleostei Neopterygii Oncorhynchus gorbuscha Oncorhynchus nerka Pacific salmon Phylum Chordata Pink Salmon Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ naturalworld nature probing spawning behavior threat posture underwater underwaterphoto wild wild salmon
Sockeye Salmon female attacking a jack.
Sockeye Salmon (Oncorhynchus nerka) female attacking a jack. Aspect Ratio = 2:3.
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ naturalworld nature underwater underwaterphoto wild wild salmon
Sockeye Salmon female on female aggression
A female Sockeye Salmon a.k.a. Red Salmon (Oncorhynchus nerka) attacking a female who is excaving a redd too close to hers in an Alaska, USA stream during the summer.
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate aggression biosphere chordate female behavior femalefemale interaction underwater fighting in situ naturalworld nature salmonography.com spawning spawning behavior underwater underwaterphoto wild wild salmon
Sockeye Salmon female on female aggression
A female Sockeye Salmon a.k.a. Red Salmon (Oncorhynchus nerka) attacking a female who is excaving a redd that is too close to hers in an Alaska, USA stream during the summer.
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate aggression biosphere chordate female behavior femalefemale interaction fighting in situ naturalworld nature spawning spawning behavior underwater underwaterphoto wild wild salmon
Love bite?
A female Coho Salmon (Oncorhynchis kisutch) defending her space from a male.
Actinopterygii Alaska Alaska wild salmon Autumn Chordata Class Actinopterygii Coho Salmon Infraclass Teleostei Neopterygii Oncorhynchus kisutch Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ naturalworld nature threat posture underwater underwaterphoto wild wild salmon
Coho Salmon female on female aggression
A female Coho Salmon (Oncorhynchis kisutch) defending her space from a male.
Actinopterygii Alaska Alaska wild salmon Autumn Chordata Class Actinopterygii Coho Salmon Infraclass Teleostei Neopterygii Oncorhynchus kisutch Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ naturalworld nature threat posture underwater underwaterphoto wild wild salmon
Love bite?
A male Coho Salmon attacking a female.
Actinopterygii Alaska Alaska wild salmon Autumn Chordata Class Actinopterygii Coho Salmon Infraclass Teleostei Neopterygii Oncorhynchus kisutch Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ naturalworld nature underwater underwaterphoto wild wild salmon
Fighting Coho Salmon males
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Actinopterygii Alaska Alaska wild salmon Autumn Chordata Class Actinopterygii Coho Salmon Infraclass Teleostei Neopterygii Oncorhynchus kisutch Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ naturalworld nature probing spawning behavior threat posture underwater underwaterphoto wild wild salmon
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Actinopterygii Alaska Alaska wild salmon Autumn Chordata Class Actinopterygii Coho Salmon Infraclass Teleostei Neopterygii Oncorhynchus kisutch Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ naturalworld nature threat posture underwater underwaterphoto wild wild salmon
Coho Salmon female vs. another
A Coho Salmon (Oncorhyncus kisutch) female threatens another female who is enrouching on her redd territory.
Actinopterygii Alaska Alaska wild salmon Autumn Chordata Class Actinopterygii Coho Salmon Infraclass Teleostei Neopterygii Oncorhynchus kisutch Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ naturalworld nature threat posture underwater underwaterphoto wild wild salmon
Fighting Coho Salmon males
Competing to be alpha male, one male Coho Salmon (Oncorhynchus kisutch) attacks another .
Actinopterygii Alaska Alaska wild salmon Autumn Chordata Class Actinopterygii Coho Salmon Infraclass Teleostei Neopterygii Oncorhynchus kisutch Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ naturalworld nature threat posture underwater underwaterphoto wild wild salmon
Defending her redd
A female Coho Salmon (Oncorhynchus kisutch) agressively defends her redd while her alpha male and his rivals stand by.
Actinopterygii Alaska Alaska wild salmon Autumn Chordata Class Actinopterygii Coho Salmon Infraclass Teleostei Neopterygii Oncorhynchus kisutch Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ naturalworld nature threat posture underwater underwaterphoto wild wild salmon
Love bite?
A female Coho Salmon (Oncorhynchis kisutch) defending her space from a male.
Actinopterygii Alaska Alaska wild salmon Autumn Chordata Class Actinopterygii Coho Salmon Infraclass Teleostei Neopterygii Oncorhynchus kisutch Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ naturalworld nature threat posture underwater underwaterphoto wild wild salmon
Fighting Coho Salmon males
A Coho Salmon (Oncorhynchus kisutch) male threatens another by gaping.
Actinopterygii Alaska Alaska wild salmon Autumn Chordata Class Actinopterygii Coho Salmon Infraclass Teleostei Neopterygii Oncorhynchus kisutch Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ naturalworld nature threat posture underwater underwaterphoto wild wild salmon
Fighting Coho Salmon
A male Coho Salmon biting a female.
Actinopterygii Alaska Alaska wild salmon Autumn Chordata Class Actinopterygii Coho Salmon Infraclass Teleostei Neopterygii Oncorhynchus kisutch Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon Snell's window South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ naturalworld nature underwater underwaterphoto wild wild salmon
Fighting Coho Salmon
A male Coho Salmon biting a female.
Actinopterygii Alaska Alaska wild salmon Autumn Chordata Class Actinopterygii Coho Salmon Infraclass Teleostei Neopterygii Oncorhynchus kisutch Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon Snell's window South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate aggression biosphere chordate false spawning fighting in situ naturalworld nature spawning behavior underwater underwaterphoto wild wild salmon
Male Sockeye Salmon displaying gaping threat posture
Aggressive behavior of male Sockeye Salmon (Oncorhynchus nerka) competing for the same female. Underwater view in an Alaskan stream during autumn.
Actinopterygii Alaska Alaska wild salmon Autumn Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ male aggression male behavior male threat posture naturalworld nature threat posture underwater underwaterphoto wild wild salmon
Attack!
Competing to be alpha male, one male Sockeye Salmon (Oncorhynchus nerka) attacks another .
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ male aggression male behavior naturalworld nature underwater underwaterphoto wild wild salmon
Attack!
A Pink Salmon (Oncorhynchus gorbuscha) alpha male is attacked by a challenger. Underwater view in an Alaskan intertidal stream during the summer.
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Humpback Salmon Infraclass Teleostei Neopterygii Oncorhynchus gorbuscha Pacific salmon Phylum Chordata Pink Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ intertidal spawning male behavior male threat posture naturalworld nature salmonography.com threat posture underwater underwaterphoto wild wild salmon
Female competition
A female Sockeye Salmon (Oncorhynchus nerka) attacks another female. Underwater view in an Alaskan stream during the summer.
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate aggression biosphere chordate female behavior female threat posture femalefemale interaction femalefemale interaction underwater fighting in situ naturalworld nature underwater underwaterphoto wild wild salmon
Rival male Sockeye Salmon
A male Sockeye Salmon (Oncorhynchus nerka) fends off an intruding male with the gape threat. Aspect Ratio = 2:3.
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ male behavior male threat posture naturalworld nature salmonography.com threat posture underwater underwaterphoto wild wild salmon
Female competition
A female Sockeye Salmon (Oncorhynchus nerka) fends off an intruding female with the gape threat. Underwater view in an Alaskan stream during early summer.
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate aggression biosphere chordate female behavior female threat posture femalefemale interaction femalefemale interaction underwater fighting in situ naturalworld nature salmonography.com threat posture underwater underwaterphoto wild wild salmon
Male Sockeye Salmon displaying gaping threat
Male Sockeye Salmon (Oncorhynchus nerka) displaying gaping threat.
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ male behavior male threat posture naturalworld nature threat posture underwater underwaterphoto wild wild salmon
Male Sockeye Salmon displaying gaping threat
Male Sockeye Salmon (Oncorhynchus nerka) displaying gaping threat
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ naturalworld nature probing spawning behavior threat posture underwater underwaterphoto wild wild salmon
Male-male competition
A male Sockeye Salmon (Oncorhynchus nerka) fends off an intruding male with the gape threat. Underwater view in an Alaskan stream during early summer.
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate aggression alpha male biosphere chordate fighting in situ male aggression male behavior male threat posture naturalworld nature salmonography.com threat posture underwater underwaterphoto wild wild salmon
Clashing male salmon
Male Sockeye Salmon (Oncorhynchus nerka) attacking a competitor. Underwater view in an Alaskan stream during early summer.
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ male aggression male behavior naturalworld nature underwater underwaterphoto wild wild salmon
Male Sockeye Salmon attacking a competitor
Male Sockeye Salmon (Oncorhynchus nerka) attacking a competitor.
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ male aggression male behavior naturalworld nature underwater underwaterphoto wild wild salmon
Male and female Pink Salmon gaping
Male and female Pink Salmon (Oncorhynchus gorbuscha) ousting an intruding male by gaping
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Humpback Salmon Infraclass Teleostei Neopterygii Oncorhynchus gorbuscha Pacific salmon Phylum Chordata Pink Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ naturalworld nature underwater underwaterphoto wild wild salmon
Pink Salmon alpha male attacks a sneaker male
Pink Salmon (Oncorhynchus gorbuscha) alpha male attacks a sneaker male as female probes her redd. Aspect Ratio = 2.3.
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Humpback Salmon Infraclass Teleostei Neopterygii Oncorhynchus gorbuscha Pacific salmon Phylum Chordata Pink Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate biosphere chordate in situ naturalworld nature underwater underwaterphoto wild wild salmon
Female Pink Salmon defending her redd from a Chum Salmon
Female Pink Salmon (Oncorhynchus gorbuscha) defending her redd from an intruding Chum Salmon (Oncorhynchus keta).
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Humpback Salmon Infraclass Teleostei Neopterygii Oncorhynchus gorbuscha Pacific salmon Phylum Chordata Pink Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate aggression biosphere chordate confrontation between species fighting in situ naturalworld nature underwater underwaterphoto wild wild salmon
Male Sockeye Salmon attacking a competitor
Male Sockeye Salmon (Oncorhynchus nerka) attacking a competitor
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate aggression biosphere chordate fighting in situ naturalworld nature underwater underwaterphoto wild wild salmon

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