Genus
Common name: Hypnea
Scientific name: Hypnea
Hypnea is a genus of red algae known for its bushy, often reddish appearance, which can add a splash of color and natural diversity to a reef aquarium. Species within this genus, such as Hypnea pannosa, are sometimes harvested for their carrageenan content, a compound used in the food industry. In the aquarium, Hypnea species can be beneficial by absorbing excess nutrients, but they should be kept in check to prevent overgrowth. They thrive in moderate lighting and water flow, and can be a good choice for refugiums where they can grow without competing with corals for space and resources.