How many letters does the top answer for “small to medium-sized shallow-water fishes of the pacific coast of north america” have?

The most common answer is surffish (8 letters).

Crossword clue: small to medium-sized shallow-water fishes of the pacific coast of north america

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

surffish 8 letters wn-def

small to medium-sized shallow-water fishes of the Pacific coast of North America

surfperch 9 letters wn-def

small to medium-sized shallow-water fishes of the Pacific coast of North America