Besides starfish and sea urchins what other animals come under echinoderms?

Answer 1

Asteroidea-asteroidea,starfish or sea stars
concentricycloidea-sea daises.
crinodea-crinoids,feather stars or sea lilies.
echinoidea-echinoids,sea urchins and sand dollars.
holothuroidea-sea cucumbers.
ophiuroidea-brittle stars and basket stars.

Answer 2

There are several extinct classes of echinoderms, and five living classes. The living ones are:

Crinoidea - Sea Lilies and Feather Stars

Holothuroidea - Sea Cucumbers

Echinoidea - Sea Urchins, Sand Dollars and Heart urchins

Asteroidea - Starfishes (also called Seastars)

Ophiuroidea - Brittle Stars

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Answer 3

There are 5 related classes in the phylum Echinodermata (the Latin name means "spiny-skinned"). For a detailed list with all classifications click here:

Sea star or starfish (Asteroidea)
Brittle stars, basket stars, serpent stars (Ophiuroidea)
Sea urchins, heart urchins and sanddollars (Echinoidea)
Holothurians or sea cucumbers (Holothuroidea)
Feather stars and sea lilies (Crinoidea).

Characteristics of Echinoderms
Echinoderms are characterized by radial symmetry, several arms (5 or more, mostly grouped 2 left - 1 middle - 2 right) radiating from a central body (= pentamerous). The body actually consists of five equal segments, each containing a duplicate set of various internal organs. They have no heart, brain, nor eyes, but some brittle stars seem to have light sensitive parts on their arms. Their mouth is situated on the underside and their anus on top (except feather stars, sea cucumbers and some urchins).

Echinoderms have tentacle-like structures called tube feet with suction pads situated at their extremities. These tube feet are hydraulically controlled by a remarkable vascular system. This system supplies water through canals of small muscular tubes to the tube feet (= ambulacral feet). As the tube feet press against a moving object, water is withdrawn from them, resulting in a suction effect. When water returns to the canals, suction is released. The resulting locomotion is generally very slow.

Answer 4

Echinoderm, common name for about 6000 living species constituting a phylum of marine animals, such as starfish, brittle stars, sea urchins, sand dollars, and sea cucumbers. They usually show a superficial five-part radial symmetry, and generally are equipped with peculiar tube feet. The phylum name is derived from the spiny skin.

Answer 5

There are 5 related classes in the phylum Echinodermata (the Latin name means "spiny-skinned"). For a detailed list with all classifications click here:

Sea star or starfish (Asteroidea)
Brittle stars, basket stars, serpent stars (Ophiuroidea)
Sea urchins, heart urchins and sanddollars (Echinoidea)
Holothurians or sea cucumbers (Holothuroidea)
Feather stars and sea lilies (Crinoidea).

Answer 6

*Asteroidea (asteroids, starfish, or sea stars): about 1,500 species that capture prey for their own food.

*Concentricycloidea (sea daisies), notable for their unique water vascular system; two species; recently merged into Asteroidea.

*Crinoidea (crinoids, feather stars or sea lilies): about 600 species that are suspension feeders.

*Echinoidea (echinoids, sea urchins and sand dollars): notable for their movable spines; about 1,000 species.

*Holothuroidea (sea cucumbers): elongated animals resembling slugs; about 1,000 species.

*Ophiuroidea (brittle stars and basket stars), the physically largest of echinoderms; about 1,500 species.

Answer 7

Another one is a sand dollar. To identify them, they must have an exoskeleton, and they are usually covered with sharp bumps. Also, the larva have bilateral symmetry, but adults have radial symmetry. Their special adaptations include scraping for algae w/ their special teeth and they have a simple nervous system.

Answer 8

Sand dollars, sea cucumbers, feather stars, brittle stars, basket stars, just to name a few...

Answer 9

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Answer 10

sea cucumbers