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they belong to phylum echinodermata...which are spiny-skinned animals. They have hard shells covered with prickly spines or needles.
They are complex invertebrates that are common in a variety of marine habitats, and include starfish, brittle-stars, sea urchins.
Today's relatives of Crinoids include sea urchins, starfish, sea cucumbers, and brittle stars. Typically, if it looks like a flower, it is a relative of the crinoids.
Two of the best-known shallow species are the green brittle star (Ophioderma brevispina), found from Massachusetts to Brazil, and the common European brittle star (Ophiothrix fragilis). Deep-water species tend to live in or on the sea floor or adhere to coral or urchins. The most widespread species is the long-armed brittle star (Amphipholis squamata), a grayish or bluish species that is strongly luminescent.
Um...brittle star?
Eucidaris tribuloides are common in the Caribbean.
There are over 6000 types of echinoderms. A few examples are the banded-arm brittle star, common sea urchin, cushion sea star, etc. I you were looking for types of echinoderms, they areSea star or starfish (Asteroidea)Brittle stars, basket stars, serpent stars (Ophiuroidea)Sea urchins, heart urchins and sand dollars (Echinoidea)Holothurians or sea cucumbers (Holothuroidea)Feather stars and sea lilies (Crinoidea).
There are two common definitions of urchins. An urchin may be a sea urchin, a small prickly animal or to a street urchin or homeless child living on the street.
what are common characteristics of chinese immortals
sea stars, sea urchins, sand dollars, and sea cucumbers.
Sea urchins live in the sea, rock pools, kelp forests, and coral reefs
Metalloids are brittle and bad conductors of electricity.