Disease

Disease can be externally evident. Possibilities include visualization of infecting organisms such as parasites and microbial growth or obvious signs such as lesions. This gallery includes non-salmonid hosts as well as marine hosts.

Female (left) and male (right) Cutthroat Trout. Female with gill maggots on base of her right pectoral and pelvic fins.
Female (left) and male (right) Searun Coastal Cutthroat Trout (Oncorhynchus clarkii clarkii). Female is infested with gill maggots (Salminicola californiensis) on base of her right pectoral and pelvic fins.
Actinopterygii Alaska Alaska wild salmon Animal arthropod Arthropoda Biology Chordata Class Actinopterygii Class Hexanauplia Coastal Cutthroat Trout Cordova Eccles Creek Ecology Infraclass Teleostei Invertebrate Lernaeopodidae Neopterygii Oncorhynchus clarkii Oncorhynchus clarkii clarkii Order Siphonosstomatoida Pacific trout Phylum Arthropoda Phylum Chordata Prince William Sound Salmincola californiensis Salmonidae Salmoniformes Salmoninae Seacam underwater housing Searun Coastal Cutthroat Trout South Central Alaska Spring Subclass Copepoda Subclass Neopterygii Subphyllum Crustacea Teleost Teleostei United States Vertebrate biological biosphere chordate copepod crustacean diadromous diadromy fresh water freshwater gill lice gill maggot in situ iteroparity iteroparous living lotic marine life migratory naturalworld nature organism parasite searun stream under fresh water underwater underwater photography underwaterphoto wild wild salmon wild trout
Spawning act
Coho Salmon (Oncorhynchus kisutch) in the act of spawning. A sneaker male that rushed in after spawning commenced is gaping close to the camera revealing several gill lice (Salmincola californiensis) in its mouth.
Actinopterygii Alaska Animal arthropod Arthropoda Autumn Biology Chordata Class Actinopterygii Class Hexanauplia Coho Salmon Ecology Infraclass Teleostei Invertebrate Lernaeopodidae Neopterygii Oncorhynchus kisutch Order Siphonosstomatoida Pacific salmon Phylum Arthropoda Phylum Chordata Reproductive behavior Salmincola californiensis Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon South Central Alaska Subclass Copepoda Subclass Neopterygii Subphyllum Crustacea Teleost Teleostei United States Vertebrate anadromous anadromy biological biosphere chordate copepod courtship crustacean diadromous diadromy fresh water freshwater gill lice gill maggot in situ living lotic migratory naturalworld nature organism parasite semelparity semelparous spawning spawning act spawning behavior stream under fresh water underwater underwaterphoto wild
Gaping male Coho salmon with parasites in mouth.
Gaping male Coho Salmon (Oncorhynchus kisutch) revealing parasitic copeods (Salmincola californiensis) known as gill maggots) in his mouth. Aspect ratio = 2:3.
Actinopterygii Alaska Alaska wild salmon Animal arthropod Arthropoda Autumn Biology Chordata Class Actinopterygii Class Hexanauplia Coho Salmon Ecology Infraclass Teleostei Invertebrate Lernaeopodidae Neopterygii Oncorhynchus kisutch Order Siphonosstomatoida Pacific salmon Phylum Arthropoda Phylum Chordata Salmincola californiensis Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon South Central Alaska Subclass Copepoda Subclass Neopterygii Subphyllum Crustacea Teleost Teleostei United States Vertebrate anadromous anadromous fish anadromy biological biosphere chordate copepod crustacean diadromous diadromy fresh water freshwater gill lice gill maggot in situ living lotic marine life migratory naturalworld nature organism parasite semelparity semelparous stream under fresh water underwater underwater photography underwaterphoto wild wild salmon
Lamprey scar
Male Sockeye Salmon (Oncorhynchus nerka) with a deep lamprey scar lived to be able to spawn.
Actinopterygii Alaska Alaska wild salmon Animal Biology Chordata Class Actinopterygii Ecology 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 biological biosphere chordate in situ living naturalworld nature organism underwater underwaterphoto wild wild salmon
Searun Coastal Cutthroat Trout in a small stream
Searun Coastal Cutthroat Trout (Oncorhynchus clarkii clarkii) in the dappled light of a small tributary of Prince William Sound, Alaska. There are Salminicola parasites on the right pectoral fin of the nearest trout.
Actinopterygii Alaska Alaska wild salmon Animal arthropod Arthropoda Biology Chordata Class Actinopterygii Class Hexanauplia Coastal Cutthroat Trout Cordova Eccles Creek Ecology Infraclass Teleostei Invertebrate Lernaeopodidae Neopterygii Oncorhynchus clarkii Oncorhynchus clarkii clarkii Order Siphonosstomatoida Pacific trout Phylum Arthropoda Phylum Chordata Prince William Sound Salmincola californiensis Salmonidae Salmoniformes Salmoninae Seacam underwater housing Searun Coastal Cutthroat Trout South Central Alaska Spring Subclass Copepoda Subclass Neopterygii Subphyllum Crustacea Teleost Teleostei United States Vertebrate biological biosphere chordate copepod crustacean dappled light diadromous diadromy fresh water freshwater gill maggot in situ iteroparity iteroparous living lotic marine life migratory naturalworld nature organism searun stream under fresh water underwater underwater photography underwaterphoto wild wild salmon wild trout
Streaming tapeworms
Loose tapewrorms (cestodes) snagged and streaming off of woody debris in a salmon stream. The source (host) of these tapeworms is unknown to me.
Actinopterygii Alaska Alaska wild salmon Animal Autumn Biology Chordata Class Actinopterygii Class Cestoda Coho Salmon Ecology Infraclass Teleostei Invertebrate Neopterygii Oncorhynchus kisutch Pacific salmon Phylum Chordata Phylum Platyhelminthes Platyhelminthes Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate biological biosphere chordate flatworm fresh water freshwater in situ living lotic marine life naturalworld nature organism stream tapeworms under fresh water underwater underwater photography underwaterphoto wild wild salmon
Round Whitefish infected with Saprolegnia
Round Whitefish (Prosopium cylindraceum) infected with the protozoan Saprolegnia on its cadal peduncle in an Alaska, USA stream during the summer.
Actinopterygii Alaska Alaska wild salmon Animal Biology Chinook Salmon Chordata Class Actinopterygii Class Oomycota Coregoninae Ecology Family Saprolegniaceae Infraclass Teleostei King Salmon Kingdom Chromalveolata Neopterygii Oncorhynchus tshawytscha Order Saprolegniales Pacific salmon Phylum Chordata Phylum Heterokontophyta Plant Prosopium cylindraceum Round Whitefish Salmonidae Salmoniformes Salmoninae Saprolegnia Seacam underwater housing South Central Alaska Subclass Neopterygii Summer Superphylum Alveolata Teleost Teleostei United States Vertebrate biological biosphere chordate cotton mold fresh water freshwater in situ iteroparity iteroparous living lotic migratory naturalworld nature organism underwater underwaterphoto wild
Sockeye Salmon with Lamprey scar
Mature Sockeye Salmon (Oncohynchus nerka) female on spawning grounds with partially healed Lamprey scar.
Actinopterygii Alaska Alaska wild salmon Animal Biology Chordata Class Actinopterygii Ecology 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 anadromous anadromy biological biosphere chordate diadromous diadromy fresh water freshwater in situ lamprey scar living lotic migratory naturalworld nature organism semelparity semelparous stream under fresh water underwater underwaterphoto wild wild salmon
Pacific Herring
Underwater view of juvenile Pacific herring (Clupea pallasii; Clupeidae) rearing in Cordova harbor, Prince William Sound, South Central Alaska. Sea lice (Caligus clemensi; Copepoda: Caligidae) are attached to some of the herring.
Actinopterygii Alaska Alaska wild salmon Animal Autumn Biology Chordata Class Actinopterygii Clupea pallasii Clupeidae Clupeiformes Ecology Harbor Infraclass Teleostei Neopterygii Pacific Herring Phylum Chordata Seacam underwater housing South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate biological biosphere chordate herring research in situ living marine life naturalworld nature organism underwater underwater photography underwaterphoto wild
Spawned-out Pink (humpback) Salmon covered with Saprolegnia
Spawned-out Pink (humpback) Salmon (Oncorhynchus gorbuscha) covered by the protozoan referred to as cotton mold (Saprolegnia) beginning the decomposition process that will eventually transform the carcass to mineral nutrients. Photo taken under water in Hartney Creek, a tributary of Prince William Sound. Summer, South Central Alaska.
Actinopterygii Alaska Alaska wild salmon Animal Biology Chordata Class Actinopterygii Class Oomycota Ecology Family Saprolegniaceae Humpback Salmon Infraclass Teleostei Kingdom Chromalveolata Neopterygii Oncorhynchus gorbuscha Order Saprolegniales Pacific salmon Phylum Chordata Phylum Heterokontophyta Pink Salmon Plant Salmonidae Salmoniformes Salmoninae Saprolegnia Seacam underwater housing South Central Alaska Subclass Neopterygii Superphylum Alveolata Teleost Teleostei United States Vertebrate anadromous anadromy biological biosphere chordate cotton mold diadromous diadromy fresh water freshwater in situ living lotic migratory naturalworld nature organism searun semelparity semelparous stream under fresh water underwater underwaterphoto wild wild salmon
Quillback Rockfish
Quillback Rockfish (Sebastes maliger) with a parasitic isopod on its dorsal fin. Aspect ratio = 4:5.
Actinopterygii Alaska Alaska wild salmon Animal Barkley Sound Biology British Columbia Canada Chordata Chup Point Class Actinopterygii Ecology Infraclass Teleostei Neopterygii Phylum Chordata Quillback Rockfish Rendezvous Dive Adventures Scorpaenidae Scorpaeniformes Seacam Seacam underwater housing Sebastes maliger South Central Alaska Subclass Neopterygii Teleost Teleostei Tyler Rock United States Vertebrate biological biosphere chordate in situ living marine marine life naturalworld nature organism parasite scuba scuba diving underwater underwater photography underwaterphoto wild www.salmonography.com
Black Rockfish
Black Rockfish (Sebastes melanops) with a parasitic copepod with twin egg cases on a dorsal fin spine. Aspect Ratio = 2:3.
Actinopterygii Alaska Alaska wild salmon Animal Barkley Sound Biology Black Rockfish British Columbia Canada Chordata Class Actinopterygii Ecology Infraclass Teleostei Neopterygii Phylum Chordata Scorpaenidae Scorpaeniformes Seacam underwater housing Sebastes melonops South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate biological biosphere chordate in situ living marine marine life naturalworld nature organism parasite scuba scuba diving underwater underwater photography underwaterphoto wild www.salmonography.com