They then extend their other arms into the water for filter feeding. : If a brittle star’s arm is cut off, it will regenerate (regrow). Brittle stars (Ophiurida) are echinoderms, the same family that includes sea stars (commonly called starfish), sea urchins, sand dollars, and sea cucumbers. They live in shal­low … "Getting around when you're round: quantitative analysis of the locomotion of the blunt-spined brittle star, https://en.wikipedia.org/w/index.php?title=Ophiocoma_echinata&oldid=951573171, Creative Commons Attribution-ShareAlike License, This page was last edited on 17 April 2020, at 20:21. Spiny Brittle Star Photo. Its disc and five arms glow with a distinct variety of candy colors and patterns, and some species of brittle star even … It is the type species of the genus Ophiocoma and is found in the tropical west … One of the more interesting of the Ophiuroidea is the brittle star … The San Diego Creature Project is an animated children’s program created by kids, for kids. Ophiocoma erinaceus Muller & Troschel 1842, the Spiny Brittle Star. [3] Despite having no brain and only having a simple, ring-shaped nervous system, O. echinata is able to adopt a coordinated pattern of locomotion in which one arm leads the way and the others act in synchrony to propel it forward. [2], Ophiocoma echinata is native to the tropical west Atlantic Ocean, the Caribbean Sea and the Gulf of Mexico. Ophiocoma echinata, the spiny ophiocoma, is a species of brittle star belonging to the family Ophiocomidae. Most kinds of sea stars need at least part of their central disk to be intact in order to regenerate arms, but a few tropical species can grow an entire body from just a severed limb. Family:  Ophiotrichidae Orange, yellow, tan, brown, green, variously patterned. Size: Disk diameter ¾ in (19 mm), arm length 6 in (15 cm), Habitat: water depth 0.35 m Under rocks, in crevices and mats of algae or invertebrates; from low-tide line to water 660 ft (2012 m) deep. Fascinating Fact: Western Spiny Brittle Star’s anchor themselves with spines of one or more arms. However, if the majority of these hunters end up on our dinner plates, their quarry can run amuck. Echinoderms, “spiny-skinned” invertebrates, are first found in the Cambrian sedimentary rock layers as 100% echinoderms. But within the phylum, sea stars and brittle stars … The New Latin class name Ophiuroidea is derived from the Ancient Greek ὄφις, meaning "serpent". It occurs in seagrass meadows, on reefs and reef flats, hiding under rocks, in cracks and crevices, under coral heads,[2] and inside sponges. Sometimes this attracts a hungry fish but fortunately, a star can't … Oral view of spiny brittle star Ophiothrix. Other members of this group … Each half then becomes a whole new animal. It is a microphage. To 5.5 inches in diameter. Found in association with living corals. They push their stomach out through their mouth (which is located on the underside of the disk of the brittle stars) and digest the prey (there is no anus). Orange, yellow, tan, brown, green, variously patterned. Hopefully a clearer vision of the spiny brittle star (Ophiothrix spiculata) I encountered on a trip to the seashore on the lowest tide in May of 2014. Brittle stars, serpent stars, or ophiuroids are echinoderms in the class Ophiuroidea closely related to starfish. Long, thorny spines on margins of arms and disk. While sea stars use their tube feet to move slowly, brittle stars use their highly flexible, spiny arms instead. 1842, the Spiny Brittle stars are a fascinating addition to any marine aquarium cut off, it regenerate... To a year for larger sea stars, or regrow, their arms and disk red markings locomotion raising... `` serpent '' tidepools at Cabrillo National Monument nocturnal scavengers that can be seen of a leg to! 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