Food: They eat barnacles, snails, sea urchins, clams, and mussels by cracking a tiny hole in the shell and inserting its stomach into the shell, then it pulls its stomach back out when it's finished.
Body Covering: They have spiny skin with tiny bumbs that absorb oxygen and clean the surface of their skin.
Movement: Sea Stars have tiny feet on the bottom of each ray (arm). These "feet" pump water through tubes to propel its self along.
Cool Facts:
- Sea stars are not actually fish (they have no fins).
- They can re-grow arms
that have broken off, and some can even re-grow entire bodies from a
single piece of arm!