Crossword Genius

Fishes’ school breaks up after end of tail’s bitten off (5)

Ross

I believe the answer is:

cohos

I'm a little stuck... Click here to teach me more about this clue!

'fishes'' is the definition.
(coho is a kind of fish)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for cohos that I've seen before include "salmon" , "Fish" .)

I've seen this clue in The Hindu.
Want a hint initially instead of a full solution? Install my app