Genus
Common name: Polysiphonia
Scientific name: Polysiphonia
Polysiphonia is a genus of red algae notable for its filamentous, brush-like structure. It's a common sight in marine aquariums, often introduced unintentionally on live rock. While some species can be invasive, they can also provide a natural and attractive element to a reef tank, offering shelter and food for small invertebrates and fish. Hobbyists should monitor growth to prevent overtake of the tank.