GENERAL HISTOLOGY

Detailed explanation-1: -Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea (/ˌæstəˈrɔɪdiə/). Common usage frequently finds these names being also applied to ophiuroids, which are correctly referred to as brittle stars or basket stars. Starfish are also known as asteroids due to being in the class Asteroidea.

Detailed explanation-2: -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-3: -True starfish are classified in the Asteroidea, a group of echinoderms. Unlike the superficially similar brittle stars (Ophiuroidea), true starfish have no sharp demarcation between arms and central body, and they move using tube feet rather than wriggling movements of the whole arms.

Detailed explanation-4: -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).

Detailed explanation-5: -Common Name: Starfish (Sea Stars) Scientific Name: Asteroidea. Type: Invertebrates.