Kinds of Echinoderms

Kinds of Echinoderms

1. sea stars

   • Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea. ... About 1,500 species of starfish occur on the seabed in all the world's oceans, from the tropics to frigid polar waters. They are found from the intertidal zone down to abyssal depths, 6,000 m (20,000 ft) below the surface.

2. brittle stars

   • They reshape the seafloor sediment surface and influence the distribution of other seafloor species. They also provide nutrition to fish, sea stars and crab predators

3. sea urchins and sand dollars

   • Sand dollar, any of the invertebrate marine animals of the order Clypeastroida (class Echinoidea, phylum Echinodermata) that has a flat, disk-shaped body. They are close relatives of sea urchins and heart urchins.

4. sea lilies or feather stars

   • an echinoderm (marine invertebrate) with a small disk-like body, long feathery arms for feeding and movement, and short appendages for grasping the surface.

5. sea cucumbers

   • Sea cucumbers are echinoderms from the class Holothuroidea. They are marine animals with a leathery skin and an elongated body containing a single, branched gonad.