Common name: Common Fireworm

General information

The Fireworm, scientifically known as Eurythoe complanata, is a type of polychaete, or bristleworm, commonly found in tropical marine environments. These segmented worms are known for their distinct reddish-brown coloration and the presence of bristles along their sides, which can cause irritation if handled without care. They are often discovered by hobbyists when they become more visible during the night or when the aquarium lights are turned off.

Care

Fireworms are detritivores, meaning they feed on dead organic material, which makes them beneficial for the natural cleanup process in an aquarium. However, they can grow to a considerable size and may become a nuisance if their population is not controlled. Regular maintenance, including siphoning the substrate and avoiding overfeeding, can help manage their numbers. Some aquarists choose to manually remove them when they become too numerous.

Reproduction

Eurythoe complanata reproduces by releasing eggs and sperm into the water column, where fertilization occurs externally. The larvae are planktonic and will settle to the bottom of the aquarium as they mature. In a well-established tank, their life cycle can contribute to the biodiversity and ecological balance within the system.

Habitat

Fireworms are found in a variety of marine habitats, including coral reefs, seagrass beds, and sandy substrates. They are adaptable creatures that can be found at various depths, often hiding during the day and becoming more active at night. In the home aquarium, they tend to inhabit the live rock and substrate, where they can find ample organic matter to feed on.