GENERAL HISTOLOGY

Detailed explanation-1: -The class Asteroidea belongs to the phylum Echinodermata. As well as the starfish, the echinoderms include sea urchins, sand dollars, brittle and basket stars, sea cucumbers and crinoids.

Detailed explanation-2: -Starfish belong to the class Asteroidea, derived from the Greek words “aster” (a star) and “eidos“ (form, likeness, appearance). There are more than 1600 species of starfish alive today, and they have an important role in the community structure of the ocean floor.

Detailed explanation-3: -Members of class Asteroidea are commonly known as sea stars or starfish (though they certainly aren’t fish). In Greek, Asteroidea means “star-like” and, as the name suggests, this class has a pentaradial body plan and is composed largely of mobile species.

Detailed explanation-4: -sea star, also called starfish, any marine invertebrate of the class Asteroidea (phylum Echinodermata) having rays, or arms, surrounding an indistinct central disk. Despite their older common name, they are not fishes.

Detailed explanation-5: -The phylum echinoderms is divided into five extant classes: Asteroidea (sea stars), Ophiuroidea (brittle stars), Echinoidea (sea urchins and sand dollars), Crinoidea (sea lilies or feather stars), and Holothuroidea (sea cucumbers). The most well-known echinoderms are members of class Asteroidea, or sea stars.