How do starfish regenerate limbs?

Diffrent types

There are about 2,000 species of starfish

The regeneration process is common amongst most starfish, but many types of starfish can only regenerate their arms, while others can regenerate their whole bodies from a single arm. These starfish can do these amazing fetes due to their unique body organ placement and Fragmentation. Fragmentation is the process of a starfish reproducing asexualy, for example once a starfish loses one of its arms that arm contains a fragment of the central disk, which houses all of the star's bodily organs. With this fragment of the central disk they are able to regrow an entirely new body, while this new starfish is being created on it's own, the body the arm originally came from is regrowing the lost limb. There was an incident on the Great Barrier Reef where there were early attempts to control the population of the Crown of Thorn Sea Stars, the exterminators trying to chop the star's up to kill them only resulting on a huge increase of population becuase every time they cut one of the stars legs of a new star grew.