How many gills does a crayfish have and what is the function of the green glands in a crayfish?
Crayfish have a total of 3 sets of gills on them. Crayfish breathe by extracting oxygen from water using their gills. ChaCha on!
Answered -
About Gills
Gills are what fish use to breath underwater. They pull dissolved oxygen out of the water the same way we pull oxygen out of the air.
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