Common name: Green Felt Algae

General information

Avrainvillea nigricans, commonly known as Green Felt Algae, is a species of marine green algae that is often found in reef aquariums. It is characterized by its dark green to almost black coloration and felt-like texture. This algae is not just a decorative addition but also plays a role in nutrient export, helping to maintain water quality by absorbing excess nutrients like nitrates and phosphates.

Care

Green Felt Algae requires moderate to high lighting to thrive in an aquarium setting. It prefers strong water movement to mimic its natural habitat, which helps to keep detritus from settling on its surface. It is important to provide a stable environment with consistent water parameters, as fluctuations can stress the algae and lead to poor growth or die-off.

Symbiosis

While not known for hosting or forming direct symbiotic relationships with marine animals, Avrainvillea nigricans can contribute to the overall health of the reef tank by providing a natural form of nutrient control. Its dense mat-like structure can also offer shelter to small invertebrates and microfauna.

Habitat

In the wild, Avrainvillea nigricans is typically found in shallow, tropical marine environments, often in sandy areas or on reef flats where it forms extensive mats. It can be found at various depths, usually not exceeding 30 meters, where it receives ample sunlight to support its growth.