fireworm
Alternative names: Polychaeta
Fireworm is a name given to segmented marine worms of the class Polychaeta. They can reach up to 30 cm in length, but most measure anywhere between 5 and 10 cm. Their bodies is usually covered with brittle bristles that can become embedded in human skin, causing irritation. These worms are also common in the Mediterranean Sea, where they live on reefs and beneath stones in rocky or sea grass areas.