Corals, amazing animals of the Sea. Hard Corals are Marine Corals that generate a hard calcium carbonate skeleton and Soft Corals do not. Reef Keeping has progressed so fast that keeping a glorious reef aquarium full of amazing species of coral has become far easier than before. Aquacultured Corals are a way of ensuring a sustainable source and coral frags are a great way to grow your own reef. Soft corals such as Leather Corals, Mushrooms and Zoanthids, and hard Corals such as SPS Acropora, Montipora, Chalice Corals, Brain Corals, Trachyphyllia, Euphyllia. Anenomes hosts to many Clownfish species.