GENERAL HISTOLOGY

Detailed explanation-1: -Sea stars are in the class Asteroidea, where brittle stars are in Ophiuroidea, which also includes basket stars. To tell the two apart, first look at their bodies. Their fundamental structure is different, especially when you look at where the arms connect to the center of the body.

Detailed explanation-2: -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-3: -Sea stars live in salt water and are found in all of the world’s oceans, from warm, tropical waters to the cold seafloor. Sea stars are mostly carnivorous and prey on mollusks-including clams, mussels and oysters-which they pry open with their suction-cupped feet.

Detailed explanation-4: -Leptasterias. Orthasterias koehleri. Pisaster brevispinus. Pisaster giganteus. Pycnopodia helianthoides. Stylasterias forreri.