Invertebrates are animals without a backbone or spinal column.

Exoskeleton Butterflies: Exoskeleton Butterflies can swim and dig! That's super cool!

Crabs: There is a real crab called a giant crab spider! If you want to see one, watch this video:

YouTube Video

 Starfish: On the bottom of a starfish, there are small tube feet to help it move! Did you know that?!