How many letters does the top answer for “the anatomy or dissection of fishes.” have?

The most common answer is ichthyotomy (11 letters).

Crossword clue: the anatomy or dissection of fishes.

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

ichthyotomy 11 letters web-def

The anatomy or dissection of fishes. [R.]

the anatomy or dissection of birds. 50% similar → ornithotomy

the anatomy or dissection of reptiles. 50% similar → herpetotomy

the dissection, or anatomy, of the viscera. 50% similar → splanchnotomy