Echinoderms

Echinoderms are aquatic creatures that grow outward from the center, usually in a star shape. The name echinoderm literally means spiny skin. Echinoderms live at the bottom of the sea, the most common one being the sea star
There are 6000 species today

Websites

Scientific names

Ophionereis reticulata
Strongylocentrotus purpuratus

Interesting fact: starfish have two stomachs