||This article needs additional citations for verification. (May
2008)| Trout is the name for a number of species of freshwater
fish belonging to the genera Oncorhynchus, Salmo and Salvelinus,
all of the subfamily Salmoninae of the family Salmonidae. The
word trout is also used as part of the name of some non-salmonid
fish such as Cynoscion nebulosus, the spotted seatrout or
speckled trout. Trout are closely related to salmon and char (or
charr): species termed salmon and char occur in the same genera
as do trout (Oncorhynchus - Pacific salmon and trout, Salmo -
Atlantic salmon and various trout, Salvelinus - char and trout).
Most trout such as Lake trout live in freshwater lakes and/or
rivers exclusively, while there are others such as the Rainbow
trout which may either live out their lives in fresh water, or
spend two or three years at sea before returning to fresh water
to spawn, a habit more typical of salmon. A rainbow trout that
spends time in the ocean is called a steelhead. The name trout
is commonly