Common name: Green Bubble Algae

General information

Green Bubble Algae, scientifically known as Dictyosphaeria cavernosa, is a species of macroalgae that is often found in marine aquariums, either intentionally or as an invasive species. It is characterized by its distinctive, spherical green vesicles that can grow quite large, resembling marbles or 'sailor's eyeballs'. While it can add a unique aesthetic to a tank, it is also known for its rapid growth and ability to overtake other marine plants and corals, which can be problematic for reef keepers.

Care

Managing Green Bubble Algae in an aquarium requires diligence. It is important to manually remove the vesicles before they burst to prevent spores from spreading. Care should be taken not to rupture the vesicles during removal, as this can release numerous spores and exacerbate the problem. Some aquarists employ natural predators, such as the Emerald Crab (Mithraculus sculptus), to help control the population of bubble algae.

Symbiosis

While Dictyosphaeria cavernosa does not have any notable symbiotic relationships, its presence in the aquarium can impact other species. It competes with corals and other algae for space and nutrients, often to the detriment of the more desirable inhabitants.

Habitat

Green Bubble Algae is commonly found in shallow, tropical marine environments around the world. It often attaches to hard substrates, such as rocks and coral rubble, where it can receive ample light for photosynthesis.