British river fish (5)
(Other definitions for bream that I've seen before include "Edible fish" , "Broad, thin fish" , "River fish" , "Fish found in amber" , "Bar me from the freshwater fish" .)
(Other definitions for tench that I've seen before include "something fishy" , "One in school" , "Freshwater fish" , "Fish of the carp family" , "catch" .)