Brown trout , Salmo trutta
Brown trout , Salmo trutta. Brook trout , Salvelinus fontinalis. Rainbow trout , Oncorhynchus mykiss. Fry, ~6 wk. Sac fry, alevin, <6 wk. Hatching. Fingerling, 6 mo. Adult 2-3 yr. Fish. Fish dominate the ______________ in most lakes, streams, rivers and estuaries.
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