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Identification and Characteristics of Osmeridae Fish Species

Explore the distinctive features of the Family Osmeridae, focusing on anatomical traits like the presence of one adipose fin, one dorsal fin, and scales, alongside the absence of axillary processes and chin barbels. This...

Questions: 8 | Attempts: 10 | Last updated: Oct 30, 2025

Sample Question 1
Which fish species has the following characteristics: large mouth, maxillary extends past midpoint of eye, lateral line incomplete, large canine teeth on vomer, and is found in marine environments only?

Gadus macrocephalus (Pacific cod)

Allosmerus elongatus(whitebait smelt)

Thaleichthys pacificus (eulachon)

Engraulis mordax (northern anchovy)

Sample Question 2
Which genus is characterized by having; a small mouth, maxillary that does not extend past midpoint of the eye, lateral line incomplete?

Genus Salmo

Genus Hypomesus

Genus Scomber

Genus Acipenser

Sample Question 3
What species has a head length LESS than 4X the diameter of eye, and LESS than 2.5X the longest anal fin ray, with scales in lateral series 53-60, and can be found in Exotic - Japan, Freshwater lagoons, with Anadromous and Freshwater forms?

Salvelinus fontinalis (Brook trout)

Hypomesus nipponensis(wakasagi)

Oncorhynchus mykiss (Rainbow trout)

Oncorhynchus keta (Chum salmon)

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