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Ophiocomina nigra, commonly known as the black brittle star or black serpent star, is a species of marine invertebrate in the order Ophiurida. [ 1 ] [ 2 ] It occurs in the north-eastern Atlantic Ocean, the North Sea, and the Mediterranean Sea.
Brittle stars, serpent stars, or ophiuroids (from Latin ophiurus 'brittle star'; from Ancient Greek ὄφις (óphis) 'serpent' and οὐρά (ourá) 'tail'; referring to the serpent-like arms of the brittle star) are echinoderms in the class Ophiuroidea, closely related to starfish. They crawl across the sea floor using their flexible arms ...
Most starfish in the genus Leptasterias have six arms, although five-armed individuals can occur. The Brisingida also contain some six-armed species. Amongst the brittle stars, six-armed species such as Ophiothela danae, Ophiactis savignyi, and Ophionotus hexactis exist, and Ophiacantha vivipara often has more than six. [14]
Ophiura ophiura is an active brittle star, moving with a jerky swimming action of its legs and sometimes burrowing. [2] It is a filter feeder, feeding on a wide range of food, [1] but also a bottom-feeding carnivore and detritivore. [7] It can regenerate its arms if they are damaged or torn off. [7] Sexual reproduction takes place during the ...
This brittle star has a circum-boreal distribution. In the northern Atlantic Ocean it is common around Iceland, Spitzbergen and Norway southwards to the North Sea.On the eastern coast of North America its range extends from Greenland southwards to Long Island, and in the Pacific Ocean, its range stretches from Japan and the Bering Sea southwards to California. [3]
Ophiuroids, also known as brittle stars, are relatively small. Brittle stars do not have a brain or eyes, but they do have a stomach, sex organs, and a mouth with five jaws. They have five long, thin, spiny arms made of calcium carbonate plates [ 2 ] connected by a central disc; the size of their disk ranges from 6-12mm disc diameter (d.d ...
Ophiocomella alexandri, known as Alexander's spiny brittle star or banded brittle star, is a species of marine brittle star. It was first described to science by Theodore Lyman in 1860. [ 1 ] Lyman states in his description that the animal is named for his friend, Alexander E. R. Agassiz , the son of Lyman's mentor, Louis Agassiz .
Ophiothrix is a large genus of brittle stars (Ophiuroidea) found in oceans worldwide from tropics to Arctic and Antarctic regions. At present a total of 93 Ophiothrix species have been recognized. It is considered as one of the most interesting genera because of the presence of its brilliant colors and associations with coral and sponges as well.