What do fish use to breathe?

1 Answer
Mika
Nov 27, 2015

They use their gills (redish color covered by the operculum around it's head). It's packed of blood vessels hence the red color. Fish sucks in water from their mouth and it exits through their gills.

Explanation:

http://iesmai.es/recursos/biologia/animal-kingdom-vertebrates/

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