1. A marine worm with a segmented body covered in bristle-like structures (setae), belonging to the class Polychaeta.
Usage: Also called polychaete worm or marine worm.; Common in marine biology and aquarium contexts.

Examples

• The bristleworm crawled across the ocean floor using its numerous bristles for movement.
• Marine biologists collected bristleworms from the coral reef to study their behavior.
• Bristleworms are important members of the benthic ecosystem.
• The aquarium tank contained several species of bristleworms.
• Some bristleworms are bioluminescent and glow in the dark.