Genus
Common name: Cushion Star Sponge
Scientific name: Spirastrella
Spirastrella is a genus of marine sponges known for their hardy nature and cushion-like appearance, making them a unique addition to reef aquariums. They are characterized by their star-shaped spicules, which give them a distinctive texture. These sponges are filter feeders, helping to maintain water quality by consuming bacteria and particulate organic matter. They require moderate to high water flow and some exposure to light, although they are not as light-dependent as photosynthetic corals. Spirastrella species are generally non-aggressive and can coexist with a variety of tank mates.