Starfish
Alternative names: Sea star, Asteroidea
The starfish is a marine invertebrate which commonly has a central disc and five or more arms. The starfish can regenerate a lost arm which in useful when, in order to escape a predator, it needs to leave its arm behind and get away.
Most starfish have a spiky shell which offers them protection and also they come in a variety of colors and patterns which allows them to camouflage.