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polychaete
(redirected from Bristle worm)

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polychaete

Any 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.



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Related to leeches and earthworms, this bristle worm lives on algae along the sea coast in Australia.
Also for the explorer, Blood Bay Reef and the small caves in its vicinity are home to several varieties of coral, purple sea anemones, yellow sea fans and rust-colored bristle worms.
 
 
 
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