Grayling
Thymallus thymallus
Length up to 50cm

An attractive fish of unpolluted, fast-flowing streams and shallow rivers. Widespread and locally common in England and Wales; absent from Ireland but introduced and established in S Scotland. Has large and diagnostic dorsal fin and small adipose fin, a character shared by members of salmon family. Apart from fin, outline streamlined and rather trout-like. Often lives in shoals.