Jack salmon
Lurking jack
A Sockeye Salmon (Oncorhynchus nerka) jack lurking near the tail of an alpha male. In the background, the female they want to spawn with is visible above the alpha male's head.
25Mile CreekActinopterygiiAlaskaChordataClass ActinopterygiiCopper River DeltaInfraclass TeleosteiNeopterygiiOncorhynchus nerkaPacific salmonPhylum ChordataRed SalmonSalmonidaeSalmoniformesSalmoninaeSockeye SalmonSouth Central AlaskaSubclass NeopterygiiSummerTeleostTeleosteiUnited StatesVertebrateanadromousanadromychordatediadromousdiadromyfresh waterfreshwaterjackjack salmonloticmigratoryprecocial maleprecocious malesemelparitysemelparousstreamunder fresh waterunderwater
Coho Salmon in the act of spawning
Coho Salmon (Oncorhynchus kisutch) in the act of spawning. The male entering the fray from the top is the alpha male changing position after the two sneaker males barged in. The female is to his left. The little male with the spots in the frame on the left is a precotial male a.k.a. jack salmon.
ActinopterygiiAlaskaAutumnChordataClass ActinopterygiiCoho SalmonInfraclass TeleosteiNeopterygiiOncorhynchus kisutchPacific salmonPhylum ChordataPower CreekSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSilver SalmonSouth Central AlaskaSubclass NeopterygiiTeleostTeleosteiUnited StatesVertebratealpha maleanadromousanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnaturenear Cordovaprecocial maleprecocious malesemelparitysemelparousspawningspawning actspawning behaviorstreamunder fresh waterunderwaterunderwaterphotowild
Coho Salmon jack hiding
A Coho Salmon a.k.a. Silver salmon (Oncorhynchus kisutch) jack or precotial male hiding below an alpha male.
ActinopterygiiAlaskaAlaska wild salmonAutumnChordataClass ActinopterygiiCoho SalmonInfraclass TeleosteiNeopterygiiOncorhynchus kisutchPacific salmonPhylum ChordataPower CreekSalmonidaeSalmoniformesSalmoninaeSea Sea internal correction lensSeacam underwater housingSilver SalmonSouth Central AlaskaSubclass NeopterygiiTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnaturenear Cordovaprecocial maleprecocious malesemelparitysemelparousstreamunder fresh waterunderwaterunderwaterphotowildwild salmon
Jack observes female Chinook Salmon
This tiny Chinook Salmon (Oncorhynchus tshawytscha) jack observes a female probing a rock with her anal fin during the excavation of her redd that he desires to spawn in.
ActinopterygiiAlaskaChinook SalmonChordataClass ActinopterygiiInfraclass TeleosteiKing SalmonMontana CreekNeopterygiiOncorhynchus tshawytschaPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSouth Central AlaskaSubclass NeopterygiiSusitna River TributaryTeleostTeleosteiUnited StatesVertebratebiospherechordatein situjackjack salmonnaturalworldnaturenear Talkeetnaprecocial maleprecocious maleprobingspawning behaviorsummerunderwaterunderwaterphotowildwild salmon
Jack salmon interest
A tiny Chinook Salmon a.k.a. King Salmon (Oncorhynchus tshawytscha) jack or precocial male observes a female probing the surface of a rock with her anal fin during redd excavation in Montana Creek near Talkeetna, Alaska.
ActinopterygiiAlaskaAlaska wild salmonChinook SalmonChordataClass ActinopterygiiInfraclass TeleosteiKing SalmonMontana CreekNeopterygiiOncorhynchus tshawytschaPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSouth Central AlaskaSouth Central Alaska 1Subclass NeopterygiiSummerSusitna River TributaryTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnaturenear Talkeetnaprecocial maleprecocious maleprobingsemelparitysemelparousspawning behaviorstreamunder fresh waterunderwaterunderwaterphotowildwild salmon
Jack salmon escape
A tiny Chinook Salmon a.k.a. King Salmon (Oncorhynchus tshawytscha) jack or precocial male evades being charged at by the alpha male as the female (at right edge of frame) excavates her redd in Montana Creek near Talkeetna, Alaska.
ActinopterygiiAlaskaAlaska wild salmonChinook SalmonChordataClass ActinopterygiiInfraclass TeleosteiKing SalmonMontana CreekNeopterygiiOncorhynchus tshawytschaPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSouth Central AlaskaSouth Central Alaska 1Subclass NeopterygiiSummerSusitna River TributaryTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnaturenear Talkeetnaprecocial maleprecocious malesemelparitysemelparousstreamunder fresh waterunderwaterunderwaterphotowildwild salmon
A jack tags along as a female Chinook Salmon covers her redd
A jack tags along as a female Chinook Salmon (Oncorhynchus tshawytscha) covers her redd after spawning in Montana Creek near Talkeetna, Alaska.
ActinopterygiiAlaskaAlaska wild salmonChinook SalmonChordataClass ActinopterygiiInfraclass TeleosteiKing SalmonMontana CreekNeopterygiiOncorhynchus tshawytschaPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSouth Central AlaskaSubclass NeopterygiiSummerSusitna River TributaryTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherechordatecovering redddiadromousdiadromyfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnaturenear Talkeetnaphotographed under waterprecocial maleprecocious malesemelparitysemelparousspawning behaviorstreamtopsideunder fresh waterunderwaterunderwaterphotowildwild salmon
Coho Salmon in the act of spawning including a jack
A jack joins a pair of Coho Salmon (Oncorhynchus kisutch) in the act of spawning.
ActinopterygiiAlaskaAlaska wild salmonAutumnChordataClass ActinopterygiiCoho SalmonDolly VardenDolly Varden CharDolly Varden CharrDolly Varden Charr southern formInfraclass TeleosteiNeopterygiiOncorhynchus kisutchPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSalvelinus malmaSalvelinus malma lordiSeacam underwater housingSilver SalmonSouth Central AlaskaSubclass NeopterygiiTeleostTeleosteiUnited StatesVertebrateanadromousanadromous fishanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situloticmigratorynaturalworldsemelparitysemelparousstreamunder fresh waterunderwaterwildwild salmon
Chinook Salmon jack
A Chinook Salmon (Oncorhynchus tshawytscha) jack is positioned in a stream next to a redd.
ActinopterygiiAlaskaAlaska wild salmonChinook SalmonChordataClass ActinopterygiiInfraclass TeleosteiKing SalmonNeopterygiiOncorhynchus tshawytschaPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSouth Central AlaskaSubclass NeopterygiiSummerTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnaturephotographed under waterprecocial maleprecocious malesemelparitysemelparousstreamunder fresh waterunderwaterunderwaterphotowildwild salmon
Chinook Salmon jack
A Chinook Salmon (Oncorhynchus tshawytscha) jack is positioned in a stream next to a redd.
ActinopterygiiAlaska wild salmonChinook SalmonChordataClass ActinopterygiiInfraclass TeleosteiKing SalmonNeopterygiiOncorhynchus tshawytschaPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSubclass NeopterygiiSummerTeleostTeleosteiVertebrateanadromousanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnaturephotographed under waterprecocial maleprecocious malesemelparitysemelparousstreamunder fresh waterunderwaterunderwaterphotowildwild salmon
Chinook Salmon jack
A Chinook Salmon (Oncorhynchus tshawytscha) jack is positioned in a stream next to a redd.
ActinopterygiiAlaska wild salmonChinook SalmonChordataClass ActinopterygiiInfraclass TeleosteiKing SalmonNeopterygiiOncorhynchus tshawytschaPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSubclass NeopterygiiSummerTeleostTeleosteiVertebrateanadromousanadromybiospherechordatediadromousdiadromydiggingexcavatingfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnaturephotographed under waterprecocial maleprecocious malesemelparitysemelparousspawning behaviorstreamunder fresh waterunderwaterunderwaterphotowildwild salmon
Chinook Salmon jack
A Chinook Salmon (Oncorhynchus tshawytscha) jack is positioned in a stream next to a redd.
ActinopterygiiAlaska wild salmonChinook SalmonChordataClass ActinopterygiiInfraclass TeleosteiKing SalmonNeopterygiiOncorhynchus tshawytschaPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSubclass NeopterygiiSummerTeleostTeleosteiVertebrateanadromousanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnaturephotographed under waterprecocial maleprecocious malesemelparitysemelparousstreamunder fresh waterunderwaterunderwaterphotowildwild salmon
False spawning
Multiple male Coho Salmon (Oncorhynchus kisutch) piled up next to a nearly completed redd pocket following a false spawning. The female has moved off to the side (left side of frame) while the alpha male is downstream (in background) having left the fracas. The heavely spotted fish located above and upstream of the pile-up is a jack.
ActinopterygiiAlaskaAutumnChordataClass ActinopterygiiCoho SalmonInfraclass TeleosteiNeopterygiiOncorhynchus kisutchPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSilver SalmonSouth Central AlaskaSubclass NeopterygiiTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherechordatediadromousdiadromyfalse spawningfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnatureprecocial maleprecocious malesemelparitysemelparousspawning behaviorstreamunder fresh waterunderwaterunderwaterphotowild
False spawning
A female Coho Salmon (Oncorhynchus kisutch) exits her redd as three sneaker males including a jack (nearest fish, just entering the fray) commence to false spawn. The alpha male is poking over the female's caudal peduncle from her right side in background of shot.
ActinopterygiiAlaskaAutumnChordataClass ActinopterygiiCoho SalmonInfraclass TeleosteiNeopterygiiOncorhynchus kisutchPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSilver SalmonSouth Central AlaskaSubclass NeopterygiiTeleostTeleosteiUnited StatesVertebratealpha maleanadromousanadromybiospherechordatediadromousdiadromyfalse spawningfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnatureprecocial maleprecocious malesemelparitysemelparousspawning behaviorstreamunder fresh waterunderwaterunderwaterphotowild
Two jacks
Two jacks about to join a pair of spawning Coho Salmon (Oncorhynchus kisutch). Aspect Ratio = 4:3.
ActinopterygiiAlaskaAlaska wild salmonAutumnChordataClass ActinopterygiiCoho SalmonInfraclass TeleosteiNeopterygiiOncorhynchus kisutchPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSilver SalmonSouth Central AlaskaSubclass NeopterygiiTeleostTeleosteiUnited StatesVertebrateanadromousanadromous fishanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situloticmigratorynaturalworldnaturesemelparitysemelparousstreamunder fresh waterunderwaterunderwaterphotowildwild salmon
Three jacks
Three jacks attempting to join a Coho Salmon (Oncorhynchus kisutch) spawning pair. Aspect Ratio = 4:3.
ActinopterygiiAutumnChordataClass ActinopterygiiCoho SalmonInfraclass TeleosteiNeopterygiiOncorhynchus kisutchPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSilver SalmonSubclass NeopterygiiTeleostTeleosteiVertebrateanadromousanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situloticmigratorynaturalworldnaturesemelparitysemelparousstreamunder fresh waterunderwaterunderwaterphotowild
Sockeye Salmon jack
Sockeye Salmon (Oncorhynchus nerka) jack that was encroaching on a Coho Salmon (O. kisutch) redd being attacked by the alpha male while female moved to a safe distance downstream.
ActinopterygiiAutumnChordataClass ActinopterygiiCoho SalmonInfraclass TeleosteiNeopterygiiOncorhynchus kisutchOncorhynchus nerkaPacific salmonPhylum ChordataRed SalmonSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSilver SalmonSockeye SalmonSubclass NeopterygiiTeleostTeleosteiVertebrateaggressionanadromousanadromybiospherechordatediadromousdiadromyfightingfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnatureprecocial maleprecocious malesemelparitysemelparousstreamunder fresh waterunderwaterunderwaterphotowild
Sockeye Salmon spawning migration
Sockeye Salmon (Oncorhynchus nerka) nearing their spawning grounds in a Copper River Delta, Alaska stream showing variation in breeding colors a.k.a nuptial coloration. The small mostly green-colored salmon with a horizontal red bar on the left side of this image is a jack salmon or precotial male.
ActinopterygiiAlaskaChordataClass ActinopterygiiCopper River DeltaInfraclass TeleosteiNeopterygiiOncorhynchus nerkaPacific salmonPhylum ChordataRed SalmonSaddlebag CreekSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSockeye SalmonSouth Central AlaskaSubclass NeopterygiiSummerTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherebreeding colorschordatediadromousdiadromyfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnaturenuptial colorationprecocial maleprecocious malescale resorptionsemelparitysemelparousspawning migrationstagingstreamunder fresh waterunderwaterunderwaterphotowild
Three jacks
Three Sockeye salmon (Oncorhynchus nerka) jacks appear to be leading a procession of conspecifics during their spawning migration while another jack passing a normal male receives a gaping threat.
ActinopterygiiAlaskaCarangidaeChordataClass ActinopterygiiCopper River DeltaInfraclass TeleosteijackNeopterygiiOncorhynchus nerkaPacific salmonPerciformesPercoideiPhylum ChordataRed SalmonSaddlebag CreekSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSockeye SalmonSouth Central AlaskaSubclass NeopterygiiSummerTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situjack salmonloticmigratorynaturalworldnatureprecocial maleprecocious malesemelparitysemelparousstagingstreamunder fresh waterunderwaterunderwaterphotowild
Jack and female Sockeye Salmon
A jack Sockeye Salmon (Oncorhynchus nerka) approaches a female with intentions of spawning with her.
ActinopterygiiAlaskaCarangidaeChordataClass ActinopterygiiInfraclass TeleosteijackNeopterygiiOncorhynchus nerkaPacific salmonPerciformesPercoideiPhylum ChordataRed SalmonSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSockeye SalmonSouth Central AlaskaSubclass NeopterygiiSummerTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situjack salmonloticmigratorynaturalworldnatureprecocial maleprecocious malesemelparitysemelparousstreamunder fresh waterunderwaterunderwaterphotowild
Jack ejection
A Sockeye salmon (Oncorhynchus nerka) jack swims away from a spawning event after being ejected by the alpha male.
ActinopterygiiAlaskaChordataClass ActinopterygiiInfraclass TeleosteiNeopterygiiOncorhynchus nerkaPacific salmonPhylum ChordataRed SalmonSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSockeye SalmonSouth Central AlaskaSubclass NeopterygiiSummerTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnatureprecocial maleprecocious malesemelparitysemelparousstreamunder fresh waterunderwaterunderwaterphotowild
Jack rebuffed
A Sockeye Salmon (Oncorhynchus nerka) jack approaching a female to spawn with gets rebuffed by the alpha male who is using an aggressive gape display.
ActinopterygiiAlaskaCarangidaeChordataClass ActinopterygiiInfraclass TeleosteijackNeopterygiiOncorhynchus nerkaPacific salmonPerciformesPercoideiPhylum ChordataRed SalmonSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSockeye SalmonSouth Central AlaskaSubclass NeopterygiiSummerTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situjack salmonloticmigratorynaturalworldnatureprecocial maleprecocious malesemelparitysemelparousstreamunder fresh waterunderwaterunderwaterphotowild
Sockeye Salmon spawning
Sockeye Salmon (Oncorhynchus nerka) in the act of spawning. The tiny salmon on the left side of the frame is a precotial male a.k.a. jack salmon. He is also attempting to contribute to the gene pool.
ActinopterygiiAlaskaChordataClass ActinopterygiiInfraclass TeleosteiNeopterygiiOncorhynchus nerkaPacific salmonPhylum ChordataRed SalmonSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSockeye SalmonSouth Central AlaskaSubclass NeopterygiisummerTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnatureprecocial maleprecocious malesemelparitysemelparousspawningspawning actspawning behaviorstreamunder fresh waterunderwaterunderwaterphotowild
Sockeye Salmon spawning
Sockeye Salmon (Oncorhynchus nerka) in the act of spawning. The tiny salmon on the left side of the frame is a precotial male a.k.a. jack salmon. He is also attempting to contribute to the gene pool.
ActinopterygiiAlaskaChordataClass ActinopterygiiInfraclass TeleosteiNeopterygiiOncorhynchus nerkaPacific salmonPhylum ChordataRed SalmonSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSockeye SalmonSouth Central AlaskaSubclass NeopterygiisummerTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnatureprecocial maleprecocious malesemelparitysemelparousspawningspawning actspawning behaviorstreamunder fresh waterunderwaterunderwaterphotowild
Male Sockeye Salmon spawning morphs
A small jack comes alongside a normal sized male Sockeye Salmon (Oncorhynchus nerka).
ActinopterygiiAlaskaChordataClass ActinopterygiiInfraclass TeleosteiNeopterygiiOncorhynchus nerkaPacific salmonPhylum ChordataRed SalmonSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSockeye SalmonSouth Central AlaskaSubclass NeopterygiiTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnatureprecocial maleprecocious malesemelparitysemelparousstreamunder fresh waterunderwaterunderwaterphotowild
Coho Salmon female with a jack
Female Coho Salmon a.k.a. Silver salmon (Oncorhynchus kisutch) being courted by a jack in an Alaska, USA stream during the autumn.
ActinopterygiiAlaskaAlaska wild salmonAutumnChordataClass ActinopterygiiCoho SalmonInfraclass TeleosteiNeopterygiiOncorhynchus kisutchPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSilver SalmonSouth Central AlaskaSubclass NeopterygiiTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnatureprecocial maleprecocious maleprobingsemelparitysemelparousspawning behaviorstreamunder fresh waterunderwaterunderwaterphotowildwild salmon
Coho Salmon female with a jack
Coho Salmon (Oncorhynchus kisutch) female with a jack. Aspect ratio = 2:3.
ActinopterygiiAlaskaAlaska wild salmonAutumnChordataClass ActinopterygiiCoho SalmonInfraclass TeleosteiNeopterygiiOncorhynchus kisutchPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSilver SalmonSouth Central AlaskaSubclass NeopterygiiTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnatureprecocial maleprecocious malesemelparitysemelparousstreamunder fresh waterunderwaterunderwaterphotowildwild salmon
Coho Salmon after spawning with a jack
Coho Salmon (Oncorhynchus kisutch) after spawning with a jack. Aspect ratio = 2:3.
ActinopterygiiAlaskaAlaska wild salmonAutumnChordataClass ActinopterygiiCoho SalmonInfraclass TeleosteiNeopterygiiOncorhynchus kisutchPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSilver SalmonSouth Central AlaskaSubclass NeopterygiiTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnatureprecocial maleprecocious malesemelparitysemelparousspawningspawning actspawning behaviorstreamunder fresh waterunderwaterunderwaterphotowildwild salmon
Coho Salmon commencing to spawn with a jack
Coho Salmon a.k.a. Silver Silver (Oncorhynchus kisutch) commencing to spawn about to be joined by a jack in an Alaska, USA stream during the autumn.
ActinopterygiiAlaskaAlaska wild salmonAutumnChordataClass ActinopterygiiCoho SalmonInfraclass TeleosteiNeopterygiiOncorhynchus kisutchPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSilver SalmonSouth Central AlaskaSubclass NeopterygiiTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnatureprecocial maleprecocious maleprobingsemelparitysemelparousspawningspawning actspawning behaviorstreamunder fresh waterunderwaterunderwaterphotowildwild salmon
Coho Salmon female with a jack
Coho Salmon (Oncorhynchus kisutch) female with a jack. Aspect ratio = 2:3.
ActinopterygiiAlaskaAlaska wild salmonAutumnChordataClass ActinopterygiiCoho SalmonInfraclass TeleosteiNeopterygiiOncorhynchus kisutchPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSilver SalmonSouth Central AlaskaSubclass NeopterygiiTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnatureprecocial maleprecocious malesemelparitysemelparousstreamunder fresh waterunderwaterunderwaterphotowildwild salmon
Courting Coho Salmon and a Sockeye Salmon jack
A Sockeye Salmon jack emerges from the fracas that often ensues during salmon courtship, in this case another species, Coho Salmon. Aspect Ratio = 1:2.
ActinopterygiiAlaskaAlaska wild salmonAutumnChordataClass ActinopterygiiCoho SalmonInfraclass TeleosteiNeopterygiiOncorhynchus kisutchPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSilver SalmonSouth Central AlaskaSubclass NeopterygiiTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherechordatediadromousdiadromyexcavating reddfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnatureprecocial maleprecocious malesemelparitysemelparousstreamunder fresh waterunderwaterunderwaterphotowildwild salmon
Coho Salmon jack
Coho Salmon (Oncorhynchus kisutch) jack.
ActinopterygiiAlaskaAlaska wild salmonAutumnChordataClass ActinopterygiiCoho SalmonInfraclass TeleosteiNeopterygiiOncorhynchus kisutchPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSilver SalmonSouth Central AlaskaSubclass NeopterygiiTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnatureprecocial maleprecocious malesemelparitysemelparousstreamunder fresh waterunderwaterunderwaterphotowildwild salmon
Coho Salmon female with a jack
Female Coho Salmon a.k.a. Silver salmon (Oncorhynchus kisutch) being courted by a jack in an Alaska, USA stream during the autumn.
ActinopterygiiAlaskaAlaska wild salmonAutumnChordataClass ActinopterygiiCoho SalmonInfraclass TeleosteiNeopterygiiOncorhynchus kisutchPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSilver SalmonSouth Central AlaskaSubclass NeopterygiiTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherechordatecovering redddiadromousdiadromyfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnatureprecocial maleprecocious malesalmonography.comsemelparitysemelparousspawningspawning actspawning behaviorstreamunder fresh waterunderwaterunderwaterphotowildwild salmon
Sockeye Salmon female attacking a jack.
Sockeye Salmon (Oncorhynchus nerka) female attacking a jack. Aspect Ratio = 2:3.
ActinopterygiiAlaskaAlaska wild salmonChordataClass ActinopterygiiInfraclass TeleosteiNeopterygiiOncorhynchus nerkaPacific salmonPhylum ChordataRed SalmonSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSockeye SalmonSouth Central AlaskaSubclass NeopterygiiSummerTeleostTeleosteiUnited StatesVertebrateaggressionanadromousanadromybiospherechordatediadromousdiadromyfightingfresh waterfreshwaterin situloticmigratorynaturalworldnaturesemelparitysemelparousstreamunder fresh waterunderwaterunderwaterphotowildwild salmon
Spawning Coho Salmon including a jack
Coho Salmon (Oncorhynchus kisutch) including a jack commencing to spawn. Additional sneaker males entering the fray.
ActinopterygiiAlaskaAlaska wild salmonAutumnChordataClass ActinopterygiiCoho SalmonInfraclass TeleosteiNeopterygiiOncorhynchus kisutchPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSilver SalmonSouth Central AlaskaSubclass NeopterygiiTeleostTeleosteiUnited StatesVertebrateanadromousanadromous fishanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situloticmigratorynaturalworldnaturesemelparitysemelparousstreamunder fresh waterunderwaterunderwaterphotowildwild salmon
Jack among other Coho Salmon
Coho Salmon (Oncorhynchus kisutch) jack or precocious male among other coho on their spawning migration in a tributary of Eyak Lake, Alaska. Aspect Ratio = 2:3.
ActinopterygiiAlaskaAlaska wild salmonAutumnChordataClass ActinopterygiiCoho SalmonInfraclass TeleosteiNeopterygiiOncorhynchus kisutchPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSilver SalmonSouth Central AlaskaSubclass NeopterygiiTeleostTeleosteiUnited StatesVertebrateanadromousanadromous fishanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnatureprecocial maleprecocious malesalmonography.comsemelparitysemelparousspawning migrationstreamunder fresh waterunderwaterunderwaterphotowildwild salmon
A jack sneaking alongside a normal sized male Sockeye Salmon
A jack sneaking alongside a normal sized male Sockeye Salmon (Oncorhynchus nerka). Aspect Ratio = 4:5.
ActinopterygiiAlaskaAlaska wild salmonChordataClass ActinopterygiiInfraclass TeleosteiNeopterygiiOncorhynchus nerkaPacific salmonPhylum ChordataRed SalmonSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSockeye SalmonSouth Central AlaskaSubclass NeopterygiiTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnatureprecocial maleprecocious malesalmonography.comsemelparitysemelparousstreamunder fresh waterunderwaterunderwaterphotowildwild salmon
Male and two jack Coho Salmon
Coho Salmon (Oncorhynchus kisutch) males during their spawning migration; the two smaller individuals are jacks or precocious males. Aspect ratio = 2:3.
ActinopterygiiAlaskaAlaska wild salmonChordataClass ActinopterygiiCoho SalmonInfraclass TeleosteiNeopterygiiOncorhynchus kisutchPacific salmonPhylum ChordataSalmonidaeSalmoniformesSalmoninaeSeacam underwater housingSilver SalmonSouth Central AlaskaSubclass NeopterygiiTeleostTeleosteiUnited StatesVertebrateanadromousanadromybiospherechordatediadromousdiadromyfresh waterfreshwaterin situjackjack salmonloticmigratorynaturalworldnatureprecocial maleprecocious malesemelparitysemelparousstreamunder fresh waterunderwaterunderwaterphotowildwild salmon