Rays.
The fin grows in
open ambulacral grooves
Both the arm and the arm-less body regenerate, making two Star Fish.
A star fish
a starfish
regeneration
Plants, turkeys, fish, prokaryote and eukaryote cells, and a lot of things you would never think of, such as leeches.
Dorsal
sunflower starfish
The average star fish can be called star shaped or a pentagon.
I think it's a starfishIts a Star-fishActually for the kids homework, It was a "Seastar" :)
A star fish protects its self by these things they have called shape spines