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Despite being called a fish, the starfish is not a fish. It is an echinoderm, a marine animal with spiny skin and no backbone.
Starfish have the ability to regenerate. If you cut a starfish into pieces, each piece will grow into a whole new starfish.
Starfish are brainless. They have special cells that gather information and send signals with the help of a nerve network inside the body.
There is no blood in a starfish's body. Starfish use sea water instead of blood to transfer nutrients throughout their bodies.
Starfish do not have eyes, but they do have an eyespot at the tip of their arms. This eyespot helps them in sensing light.
Starfish are also called Sea Stars.
Starfish can consume food outside their body. The stomach of a starfish oozes out to consume and digest food and then finally moves back in.
There are more than 2000 species of star fish.