How many letters does the top answer for “brightly colored tropical fishes with chin barbels” have?

The most common answer is goatfish (8 letters).

Crossword clue: brightly colored tropical fishes with chin barbels

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

goatfish 8 letters wn-def

brightly colored tropical fishes with chin barbels

surmullet 9 letters wn-def

brightly colored tropical fishes with chin barbels

brightly colored tropical freshwater fishes 57% similar → tetra