What do crayfish breath?

hi, yea they are right they do breathe with gills. but its a little more complicated than than lolClass Malacostraca Order DecopodaBeing largely aquatic, most larger crustaceans breathe via gills....

Something that looks quite similar to a fish's gills.

Crayfish use gills to breath.

crayfish : early 14c., crevis, from O.Fr. crevice "crayfish" (13c., Mod.Fr. écrevisse), probably from Frankish *krebitja or a similar Germanic word that is a dim. form of the root of crab (1); e.g....

They breath in oxygen and breath out carbon dioxide, like a human through it's lungs