The Spider Sponge, Trikentrion flabelliforme, features white horizontal lines over a striking red body. Its tree-like base is covered by a white web-like polyp colony. It is a peaceful organism that should not be housed with aggressive species of fish or inverts. If threatened, it may release a toxin that can harm other tank mates. 

The Spider Sponge can reach heights of 8 inches and needs a tank of at least 30 gallons. Its diet includes dissolved organic foods containing phytoplanktons and other microfauna. Like other sponge species, the Spider Sponge should never be exposed to open air. It is relatively difficult to maintain in the home aquarium so it should be reserved for experienced aquarists only.