Many organisms in a reef are dependent on the coral

Take coral reefs, for instance.Many organisms in a reef are dependent on the coral.It provides key microhabitats,shelter and breeding grounds for thousand of species of fish,crustaceans and mollusks.Corals also form interdependent relationships with fungi and bacteria.The coral itself is a loom that allows the tangled net of biodiversity to be woven.That makes coral a keystone organism,one that many others depend on for their suvival.