Common name: Derbesia

General information

Derbesia marina, commonly known as Green Hair Algae, is a filamentous macroalgae that is often found in marine aquariums. It is a fast-growing and hardy species that can sometimes become problematic due to its invasive nature. However, when kept in check, it can serve as a natural food source for herbivorous fish and invertebrates.

Care

Managing nutrients, particularly nitrates and phosphates, is crucial in controlling the growth of Derbesia marina. Regular water changes, efficient filtration, and the use of nutrient export methods such as protein skimming can help maintain water quality. Introducing herbivorous species, like tangs or sea hares, can also help control its spread by grazing on the algae.

Symbiosis

While not known for any specific symbiotic relationships, Derbesia marina can provide shelter and food for small invertebrates and fish larvae in the aquarium. It can also be part of a refugium setup, where it helps with nutrient export and provides a habitat for microfauna.

Habitat

Derbesia marina is found in a variety of marine environments, from shallow reefs to deeper waters. It thrives in areas with good water flow and ample light, which are conditions that can also be replicated in the home aquarium to promote its growth for controlled purposes.