Clade C dominates Indo-Pacific host communities and with over 100 ecologically distinct 'types' now described, it is the most diverse and prevalent symbiont group among cnidarian host taxa worldwide
p.18 & 25; in ....
Pochon X., LaJeunesse T.C., Pawlowski J.; 2004; Biogeographic partitioning and host specialization among foraminiferan dinoflagellate symbionts (Symbiodinium; Dinophyta); Marine Biology, 146: 1727;