WebDifferent species of brittle stars eat in different ways — some are suspension feeders and eat food particles suspended in the water; some are deposit feeders and feed on organic … WebThe daisy brittle star has a star-shaped body that is radially symmetrical and supported by a hard endoskeleton made of calcium. Its 5-7 spiny, jointed arms are attached to a central …
Introduction to the Ophiuroidea - University of California …
WebOct 10, 2024 · They resemble brittle stars but with branching arms. Feather Stars: (~700 species) they have five or more (usually at least 10) arms that are feathery in appearance. These ‘feathers’ are called pinnules and serve as food-gathering organs. Feather stars typically feed at night and are seldom seen, hence no photo! Brittle stars will eat small suspended organisms if available. In large, crowded areas, brittle stars eat suspended matter from prevailing seafloor currents. In basket stars, the arms are used to sweep food rhythmically to the mouth. Pectinura consumes beech pollen in the New Zealand fjords (since those trees hang … See more 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 … See more The sexes are separate in most species, though a few are hermaphroditic or protandric. The gonads are located in the disk, and open into … See more Brittle stars use their arms for locomotion. Brittle stars move fairly rapidly by wriggling their arms which are highly flexible and enable the animals to make either snake-like or rowing movements. However, they tend to attach themselves to the sea floor or to … See more The ophiuroids diverged in the Early Ordovician, about 500 million years ago. Ophiuroids can be found today in all of the major marine provinces, from the poles to the tropics. Basket … See more Of all echinoderms, the Ophiuroidea may have the strongest tendency toward five-segment radial (pentaradial) symmetry. The body outline is similar to that of starfish, in that ophiuroids have five arms joined to a central body disk. However, in ophiuroids, the … See more Over 60 species of brittle stars are known to be bioluminescent. Most of these produce light in the green wavelengths, although a few blue-emitting species have also been … See more Brittle stars live in areas from the low-tide level downwards. Six families live at least 2 m deep; the genera Ophiura, Amphiophiura, and Ophiacantha range below 4 m. Shallow species live among sponges, stones, or coral, or under the sand or mud, with … See more how insulin is manufactured
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WebHow do sea stars exchange gases with the outside and excrete their wastes? both gases and wastes can leave the body by diffusion through papulae and tube feet select all of the … WebAug 28, 2013 · Most brittle star species are unproblematic in the aquarium, but there are some exceptions. Feeding is very easy, because they are usually carnivorous and also feed on dead animals. WebOphiuroids, the group including brittle stars and basket stars, have a somewhat different water vascular system from sea stars, despite their superficially similar appearance. The madreporite is located on the underside of the animal, usually in one of the jaw plates. high heels game 2