In asexual reproduction, a single individual produces offspring that are genetically identical to itself. Sponges and some coral colonies reproduce asexually.

Regeneration (also called fragmentation or clonal fragmentation) is a form of asexual reproduction in which a detached piece of the parent organism can grow and develop into a completely new individual. Echinoderms reproduce through regeneration. Star fish, brittle stars, sea urchins, sand dollars, and sea cucumbers are all Echinoderms. Several species of annelids and flat worms also reproduce by this method.