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Polychaeta (/ ˌ p ɒ l ɪ ˈ k iː t ə /) is a paraphyletic [1] class of generally marine annelid worms, commonly called bristle worms or polychaetes (/ ˈ p ɒ l ɪ ˌ k iː t s /). Each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called chaetae, which are made of chitin. More than 10,000 species ...
Alvinella pompejana, the Pompeii worm, is a species of deep-sea polychaete worm (commonly referred to as "bristle worms"). It is an extremophile found only at hydrothermal vents in the Pacific Ocean , discovered in the early 1980s off the Galápagos Islands by French marine biologists .
Sirsoe methanicola is a species of polychaete worm that inhabits methane clathrate deposits in the ocean floor. The worms colonize the methane ice and appear to survive by gleaning bacteria, which in turn metabolize the clathrate. In 1997, Charles Fisher, professor of biology at Pennsylvania State University, discovered the worm living on ...
The sea mouse is an active predator [2] feeding primarily on small crabs, hermit crabs and other polychaete worms including Pectinaria and Lumbriconereis. [2] It has been observed consuming other polychaete worms over three times its own body length. [2] Feeding activity takes place at night, with the animal partially buried in sand. [2]
Hesionidae are a family of phyllodocid "Bristle worms" (class Polychaeta). They are (like almost all polychaetes) marine organisms . Most are found on the continental shelf ; Hesiocaeca methanicola is found on methane ice , where it feeds on bacterial biofilms .
Aphrodita adults generally fall within a size range of 7.5 to 15 centimetres (3.0 to 5.9 in), with some growing to 30 centimetres (12 in). The body is covered in a dense mat of parapodia and setae (hairlike structures). [2]
Amphitrite ornata or ornate worm, is a species of marine polychaete worm in the family Terebellidae. [1] Polychaetes, or marine bristle worms, have elongated bodies divided into many segments. Each segment may bear setae (bristles) and parapodia (paddle-like appendages). Some species live freely, either swimming, crawling or burrowing, and ...
Syllidae, commonly known as the necklace worms, [2] is a family of small to medium-sized polychaete worms. Syllids are distinguished from other polychaetes by the presence of a muscular region of the anterior digestive tract known as the proventricle. [3] [4] Syllid worms range in size from 2–3 mm (0.08–0.12 in) to 14 centimetres (5.5 in).