Biomes Click on an animal to go to that printout. For the top 25 printouts, click here . We've had hundreds of requests recently, so it may take a while. Crustacean Printouts Crustaceans are a class of animals that have a hard exoskeleton, jointed legs, and a segmented body that is bilaterally symmetrical. Most crustaceans live in water, but some live on land.
Crustaceans are the most numerous animals in the oceans, but some crustaceans live on fresh water.
There are about 30,500 species of crustaceans around the world. The head has two compound eyes, two pairs of antennae, and three pairs of mouthparts. A pair of green glands excrete wastes near the base of antennae. The sexes are separate. The tail is fan-shaped, and ends in uropods and a telson.