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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 ...
Macrophiothrix is a genus of brittle stars. Species. Macrophiothrix albolineata (H.L. Clark, 1938) Macrophiothrix albostriata (H.L. Clark, 1928)
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Crinoids are echinoderms in the phylum Echinodermata, which also includes the starfish, brittle stars, sea urchins and sea cucumbers. [5] They live in both shallow water [6] and in depths of over 9,000 metres (30,000 ft). [7] Adult crinoids are characterised by having the mouth located on the upper surface.
Creatures like jellyfish, starfish and sand dollars rely on the wind and current to move around. If an offshore storm or strong winds push these invertebrates too close to shore, they can get ...
In these starfish and brittle stars, development is usually direct to the adult form, without passing through a bilateral larval stage. [59] A few sea urchins and one species of sand dollar carry their eggs in cavities, or near their anus, holding them in place with their spines. [ 60 ]
The crown-of-thorns starfish (frequently abbreviated to COTS), [1] Acanthaster planci, is a large starfish that preys upon hard, or stony, coral polyps (Scleractinia). The crown-of-thorns starfish receives its name from venomous thornlike spines that cover its upper surface, resembling the biblical crown of thorns. It is one of the largest ...
Coastal fish are found in the waters above the continental shelves that extend from the continental shorelines, and around the coral reefs that surround volcanic islands. . The total world shoreline extends for 356,000 km (221,000 mi) [3] and the continental shelves occupy a total area of 24.3 million km 2 (9 376 million sq mi)