Constantinos Petrinos / Purple short tentacle mushroom coral (Fungia sp.) close up of polyps. Lembeh Strait, North Sulawesi, Indonesia.

Jeff Rotman / Mushroom coral {Fungia fungites} Red Sea

Chris Newbert / Mushroom Coral (Fungia fungites) detail, Palau

Jeff Rotman / Mushroom coral {Fungia sp.} Palau Islands, Pacific Ocean

Constantinos Petrinos / Mushroom coral detail {Fungia fungites} Sulawesi Indonesia

Juergen Freund / Mushroom coral {Fungia sp.} skeleton from the Philippines

Alex Mustard / Mushroom coral (Fungia sp.) fluoresces a bright orange at depth. At this depth underwater there is no orange light left, pigments within the coral absorb blue light and emit it as orange light (the re...

Franco Banfi / Mushroom coral (Fungia fungites) close up, Cabilao House Reef, Cabilao Island, Bohol, Central Visayas, Philippines, Pacific Ocean.

Franco Banfi / Two Mushroom coral / Commensal shrimps (Cuapetes / Periclimenes kororensis) on Mushroom coral (Heliofungia actiniformis) Lighthouse Reef, Cabilao Island, Bohol, Central Visayas, Philippines, Pacific O...

Franco Banfi / Detail of Mushroom coral (Fungia fungites) Tubbataha Reef Natural Park, UNESCO World Heritage Site, Sulu Sea, Cagayancillo, Palawan, Philippines

Franco Banfi / Detail of mushroom coral (Fungia fungites) Tubbataha Natural Park, Sulu Sea, Cagayancillo, Palawan, Philippines

Constantinos Petrinos / Purple short tentacle mushroom coral (Fungia sp.) close up of polyps. Lembeh Strait, North Sulawesi, Indonesia.