Bristleworm

Bristleworms or polychaetes are a class of annelid worms, generally marine. They are named for the numerous bristles, usually made of chitin, which are found along their sides.

Anatomy

Bristleworms have a well-developed head with eyes, antennae and sensory palps. The body consists of numerous segments; each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called chaetae, which are made of chitin.

Habitat and Distribution

Bristleworms are found in all marine environments, from the intertidal zone to the deep sea. Some species live in fresh water or are terrestrial.

Diet

Most bristleworms are scavengers or predators, but some are filter feeders, and a few are parasites.

Reproduction

Bristleworms reproduce both sexually and asexually. Some species have separate sexes, while others are hermaphroditic.

Importance to Humans

Bristleworms are important in marine ecosystems as they play a key role in the decomposition process. However, they can be a nuisance to aquarists as some species are known to harm corals and other invertebrates.

See Also

• Annelid
• Chitin
• Scavenger
• Predator
• Filter feeder
• Parasite

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