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Isopod means "equal foot" -- isopods are a family of crustaceans that have seven pairs of legs all about the same size.
The isopods that you already know are "potato bugs" aka "rollie pollies" -- they are land crustaceans!
But this family has many interesting members including giant deep sea isopods the size of cats and parasitic isopods that replace the tongues of fish! Yes they eat the fish's tongue... then become the new tongue so they can mooch on the food when the fish eats!
