The most popular coral species in our hobby usually have an outstanding diversity of color patterns.  Zoanthids seem to have a limitless number of "morphs" and color variations that hobbyists enjoy collecting and trading.  Acanthastrea also appear to have an almost...

This unusual Tubastrea sp. sports some very cool polyps! Photo details: Shot top down with Canon 7D, 100mm f2.8 Macro lens, on tripod with remote shutter at f14, ISO 100, exposure 1.6 s