Coral diversity

The location of coral reefs, together with contours representing gradients of species richness among reef-building scleractinian coral species. Note that graphic presentation at this scale enormously exaggerates actual reef area.
Source: reproduced by permission, with modification, from Veron.
Veron, J.E.N. 1995. Corals in space and time: the biogeography and evolution of the Scleractinia. University of New South Wales Press.