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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.
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Heliaster kubiniji is a species of starfish in the order Forcipulatida. It is commonly known as the gulf sun star , the common sun star or estrella de mar de golfo and it occurs in the intertidal zone of the Pacific coast of California, Mexico and Nicaragua.
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.
A starfish has five identical arms with a layer of “tube feet” beneath them that can help the marine creature move along the seafloor, causing naturalists to puzzle over whether sea stars have ...
The starfish body plan consists of five to six arms radiating from a central disk. Regenerative ability differs greatly among starfish species, but can generally be classified within three categories: unidirectional regeneration, disk-dependent bidirectional regeneration, and disk-independent bidirectional regeneration.
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 ...