Common name: bearded fireworm

General information

The Bearded Fireworm, Hermodice carunculata, is a type of bristle worm that is both fascinating and feared by many aquarists due to its potent sting. These worms are known for their bright colors and the distinctive bristles that line their sides, which can inflict a painful sting if handled without care. They are often found in the Caribbean, the Atlantic Ocean, and the Mediterranean Sea.

Care

Bearded Fireworms are not recommended for most reef aquariums as they can cause significant damage to coral and other invertebrates. They are opportunistic feeders, preying on small animals and detritus. If one is found in an aquarium, it is usually by accident, and they should be carefully removed using tweezers or a trap.

Reproduction

Reproduction in Hermodice carunculata involves a fascinating phenomenon called epitoky, where a part of the worm transforms into a reproductive individual called an epitoke during the breeding season. These epitokes are packed with eggs or sperm and will swim towards the surface to release their gametes for external fertilization.

Symbiosis

While not typically involved in beneficial symbiotic relationships within a reef tank, Bearded Fireworms have been observed participating in cleaning symbiosis in the wild, where they remove parasites from fish.

Habitat

Hermodice carunculata is commonly found in shallow waters, often hiding under rocks or within coral rubble during the day. They are more active at night when they venture out to feed.