Common name: Bubble Algae

General information

Valonia utricularis, commonly known as Bubble Algae or Sailor's Eyeballs, is a species of green macroalgae that is often found in marine aquariums, either intentionally or as an invasive species. It is characterized by its distinctive, large, spherical, and smooth green vesicles that can grow up to 5 centimeters in diameter. These vesicles are filled with water and can create a unique visual effect in the aquarium.

Care

Bubble Algae can be both a decorative and a problematic presence in a saltwater aquarium. It requires moderate lighting and can grow in a range of water conditions. However, it can quickly become invasive, outcompeting other algae and potentially overrunning the tank if not kept in check. Manual removal is the most common method of control, but care must be taken to avoid rupturing the vesicles, which can release spores and exacerbate the problem.

Symbiosis

While not known for any specific symbiotic relationships, Bubble Algae can provide microhabitats for small invertebrates and may contribute to the overall biodiversity of the aquarium ecosystem.

Habitat

Valonia utricularis is found in tropical and subtropical oceans worldwide. It typically grows on hard substrates in shallow waters, often in areas with moderate water movement. In the wild, it can be found on coral reefs, rocks, and other submerged surfaces.