Common name: Leach's compound ascidian

General information

The Golden Star Tunicate, Botryllus leachii, is a colonial ascidian or sea squirt found in various marine environments. This species is known for its beautiful star-shaped colonies that can add a unique aesthetic to any reef aquarium. Each individual within the colony is called a zooid, and together they form a mat-like structure on surfaces.

Care

Botryllus leachii is relatively easy to care for in a well-established reef aquarium. They require stable water conditions and benefit from moderate to high water flow, which facilitates feeding on suspended particles. They are filter feeders, consuming phytoplankton and dissolved organic matter, so maintaining water quality is crucial.

Reproduction

Reproduction in Botryllus leachii is both sexual and asexual. Colonies can grow by budding new zooids or through the release of gametes into the water column. In the aquarium, they often reproduce asexually, expanding their colony size over time.

Symbiosis

While not known for specific symbiotic relationships like clownfish and anemones, tunicates like Botryllus leachii play a role in the reef ecosystem by filtering water and potentially providing a surface for other organisms to settle.

Habitat

Golden Star Tunicates are found in a range of habitats from shallow waters to depths of several meters. They often attach to hard substrates such as rocks, pier pilings, and even other sessile organisms. Their distribution includes temperate and tropical waters worldwide.