Common name: Mediterranean Fanworm

General information

The Mediterranean Fanworm, Sabella fallax, is a species of marine polychaete worm belonging to the family Sabellidae. It is known for its beautiful, fan-like crown which is used for both feeding and respiration. This species is native to the Mediterranean Sea and parts of the North Atlantic Ocean. The fanworm's crown consists of numerous feathery tentacles that can be retracted into a protective tube, which the worm secretes around itself.

Care

In the aquarium, Sabella fallax can be a fascinating addition due to its unique appearance and behavior. They require a substrate in which they can anchor their tubes and prefer areas with moderate to strong water flow to assist in feeding. They are filter feeders, consuming plankton and suspended particles in the water. It's important to ensure that the water quality is high, with low levels of nitrates and phosphates, to mimic their natural clean water habitat.

Reproduction

Fanworms are known to reproduce both sexually and asexually. In the aquarium, sexual reproduction is less common, but hobbyists may observe the release of gametes into the water column. Asexual reproduction can occur through the breaking of the worm's body, with each part potentially growing into a new individual.

Symbiosis

While not known for any specific symbiotic relationships, fanworms do contribute to the overall health of the reef ecosystem by filtering water and reducing particulate matter.

Habitat

Sabella fallax is typically found in shallow waters, often attaching to hard substrates such as rocks, shells, or man-made structures. They can be found at various depths, usually not exceeding 30 meters.