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polychaete |
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polychaeteAny of about 5,400 species of marine worms of the annelid class Polychaeta, having a segmented body with many setae (bristles) on each segment. Species, often brightly coloured, range from less than 1 in. (2.5 cm) to about 10 ft (3 m) long. Most body segments bear two bristly parapodia (lobelike outgrowths). The head has short sensory projections and tentacles. Adults may be free-swimming or sedentary; larvae are free-swimming. Found worldwide, polychaetes are important for turning over sediment on the ocean bottom. One species, the bloodworm, is a popular saltwater fish bait. See also tube worm. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| These were made by organisms, possibly polychaete worms, which mined the original burrow fills for nutrients (Kendall, 1977). A newly discovered species of the polychaete genus Vigtorniella also forms dense colonies "like lawns of orange grass around the whale skeleton," says Smith. Effects of Black Rock Harbour Dredged Material on the Histopathology of the Blue Mussel Mytilus edulis and Polychaete Worm Nephtys Incisa after Laboratory and Field Exposures. |
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