What is a bristleworm?
Bristleworms are elongated segmented worms. Each segment contains a pair of bristles. Although bristleworms are not aggressive, they bite when handled, and the bristles can penetrate skin (sting). Bristleworms are often found under rocks and corals in tropical areas throughout the world. You're more likely to come across one if you have a saltwater aquarium. You should use heavy gloves if you need to handle one.
From: Wilderness: Bristleworm Sting WebMD Medical Reference
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