1. Asteroidea definition, the class comprising the starfishes

2. Starfishes belong under the class Asteroidea

3. Asteroidean definition, an echinoderm of the class Asteroidea, comprising the starfishes

4. Class Asteroidea Sea stars, often called starfishes, demonstrate the basic features of echinoderm structure and function very well, and they are easily obtainable

5. Like their relatives—starfishes, sea urchins, sea cucumbers, and brittle stars—Crinoids are echinoderms, animals with rough, spiny surfaces and a special kind of radial symmetry based on five or multiples of five

6. Echinoderms, which are exclusively marine animals, are divided into five classes, the Asteroidea (starfishes), Ophiuroidea (serpent-stars), Echinoidea (sea-urchins, heart-urchins, and sand-dollars), Holothuroidea (sea-cucumbers), and Crinoidea (sea-lilies and feather-stars).

7. Asteroidea definition is - the class of echinoderms comprising the starfishes, all being unattached, having (1) a star-shaped or pentagonal body, the rays or arms (usually 5 in number) hollow and containing prolongations of the coelom and alimentary and other viscera, (2) a skeleton of calcareous plates and ossicles somewhat loosely united, often allowing the arms great freedom of movement

8. Asteroidea definition is - the class of echinoderms comprising the starfishes, all being unattached, having (1) a star-shaped or pentagonal body, the rays or arms (usually 5 in number) hollow and containing prolongations of the coelom and alimentary and other viscera, (2) a skeleton of calcareous plates and ossicles somewhat loosely united, often allowing the arms great freedom of movement, and (3) a …