South Australian Museum - All of the scleractinian corals in this photo are different species found on tropical reefs. But how do we know how many coral species are found on the
The ancient evolutionary origins of Scleractinia revealed by azooxanthellate corals | BMC Ecology and Evolution | Full Text
Fossils of the Paleozoic: Phylum Cnidaria (The Corals) – Laboratory Manual for Earth History
Solenastrea hyades (fossil coral) (Croatan Formation, Lower Pleistocene; eastern North Carolina, USA) | Fossil, Fossils, Prehistoric animals
Scleractinian coral fossil Photograph by Science Photo Library - Fine Art America
Fossils of the Paleozoic: Phylum Cnidaria (The Corals) – Laboratory Manual for Earth History