Mushroom coral  (Heliofungia actiniformis)

Close up of Heliofungia actiniformis tentacles
Close up of Heliofungia actiniformis tentacles
© Tim Wijgerde		 Heliofungia actiniformis, close up
Heliofungia actiniformis, close up
© Jurgen Freund / naturepl.com		 Heliofungia actiniformis, polyps extended
Heliofungia actiniformis, polyps extended
© Georgette Douwma / naturepl.com
Heliofungia actiniformis, with polyps extended
Heliofungia actiniformis, with polyps extended
© Mark Spencer / Auscape International		 Heliofungia actiniformis
Heliofungia actiniformis
© Jurgen Freund / naturepl.com		 Heliofungia actiniformis colonies
Heliofungia actiniformis colonies
© Eric H. Borneman