Common name: hen pen

General information

Bryopsis plumosa, commonly known as Feather Algae or Plume Algae, is a type of macroalgae that is both admired for its delicate, feathery appearance and often dreaded by aquarists for its potential to become an invasive nuisance in saltwater aquariums. Despite its reputation, when kept in check, it can add a natural and beautiful element to the aquascape.

Care

Managing Bryopsis plumosa in an aquarium setting requires diligence. It thrives in environments with high nutrients, particularly nitrates and phosphates. To prevent overgrowth, regular water changes, nutrient export through protein skimming, and maintaining a clean tank are essential. Some hobbyists also employ natural predators like certain species of sea hares, hermit crabs, and tangs to keep Bryopsis populations under control.

Symbiosis

While Bryopsis plumosa does not have any specific symbiotic relationships that are beneficial to reef tanks, it can provide microhabitats for small invertebrates and fish fry. However, its rapid growth can overshadow corals and other sessile invertebrates, competing for light and space, which can be detrimental to the overall health of the aquarium.

Habitat

Bryopsis plumosa is found in a variety of marine environments, from shallow rock pools to deeper waters. It is a cosmopolitan species, occurring in temperate and tropical seas worldwide. In the wild, it often grows on rocks, shells, and other hard substrates where there is sufficient light and water movement.