amphinomids

Amphinomids are a family of marine polychaete worms. They belong to the order Phyllodocida and are characterized by their brightly colored, bristly bodies. These bristles, called chaetae, are often hollow and can contain venom, serving as a defense mechanism against predators. Amphinomids are typically found in shallow, warm waters, inhabiting coral reefs, rocky shores, and seagrass beds.

Several species within the Amphinomidae family are well-known. The fireworm genus, for example, is notable for its urticating chaetae that can cause a stinging sensation upon contact with human skin. These worms play a role in marine ecosystems by consuming algae and detritus, contributing to nutrient cycling. They are also a food source for various fish and other marine invertebrates. Amphinomids exhibit diverse feeding strategies, with some being deposit feeders and others active predators. Their reproduction typically involves external fertilization, with free-swimming larvae.