Cave coral (Tubastrea sp.) (Dendrophyllidae) polyps extended and feeding at night, Queensland, Australia, Pacific

Detail of coral polyps, Tubastrea sp., growing on a healthy reef in Raja Ampat, Indonesia.

A bright cup coral, Tubastrea sp., grows on a remote reef in Raja Ampat, Indonesia.

Diver explores the reef wall covered with orange cup coral (Tubastrea sp.), Coconut point, Apo island Marine Reserve, Philippines, Southeast Asia, Asia

Diver explores the reef wall covered with orange cup coral (Tubastrea sp.), Coconut point, Apo island Marine Reserve, Philippines, Southeast Asia, Asia