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Underside of a sunflower sea star. Sunflower sea stars can reach an arm span of 1 m (3.3 ft). They are the heaviest known sea star, weighing about 5 kg. [4] They are the second-biggest sea star in the world, second only to the little known deep water Midgardia xandaros, whose arm span is 134 cm (53 in) and whose body is 2.6 cm (roughly 1 inch) wide. [7]
Solaster dawsoni attacking a spiny red sea star, Hippasteria spinosa An adult specimen of Solaster dawsoni afflicted by the Sea star wasting disease off Vancouver. The morning sun star is a predator, feeding mostly on other starfish. It is feared by other stars which move away as fast as they can if touched by a morning sun star.
Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea (/ ˌ æ s t ə ˈ r ɔɪ d i ə /). 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
The common sunstar (Crossaster papposus) is a species of sea star (aka starfish) ... This page was last edited on 19 February 2025, at 07:23 (UTC).
The animal has true image-forming vision. [3] Adult crown-of-thorns starfish normally range in size from 25 to 35 cm (10 to 14 in). [4] They have up to 21 arms. [3] [5] Although the body of the crown of thorns has a stiff appearance, it is able to bend and twist to fit around the contours of the corals on which it feeds.
About 260 extant species within 70 genera are currently known, which make this family the most diverse of all the sea stars, [5] even if half of the genera are monospecific.
Labidiaster annulatus, the Antarctic sun starfish or wolftrap starfish is a species of starfish in the family Heliasteridae. It is found in the cold waters around ...
In the marine aquarium hobby, they have been seen to consume Asterina Starfish, [4] which are commonly introduced into such aquaria on the ubiquitous "live rock" used in such settings. In 2021 pictures surfaced on Reddit of a linckia eating an Asternia it takes roughly 45 mins to fully devour the starfish. It's a worthy pest control depending ...