The segmented structures in a fin that provide support.
A young or small fish, especially a young salmon or trout.
A fish that hatches in a small tributary, rears there for 1-4 years, and then migrates out to a larger river to mature. The fish then migrates back to the tributary to spawn.
Small fish, especially young, recently hatched fish.
A streamlined body shape typical of most salmonines (trout, salmon and whitefish) which consists of a body which is taller than it is wide. This "torpedo" shape reduces resistance in the current allowing trout to hold position in a stream. An example of a fish with a non-fusiform body shape is the largescale sucker.