The Knobby Finger Coral (Porites duerdeni) is a marine (saltwater) coral in the Poritidae family of polyp stony corals.
The Knobby Finger Coral looks like short, stubby, branching fingers in small, mound-shaped colonies. The top of each finger is spherical. It has widely spaced calices with retracted polyps. It has a well-developed wall reticulum. It can be varied in colour from light grey to yellowish-green and pinkish-red. It is sessile (not moving), with a mouth in each polyp.
It measures up to 100 metres (39 inches) across.
It is abundant and found in shallow reefs and lagoons around the world, particularly in the Great Barrier Reef of Australia.
It feeds on organisms and plankton.
Location of photograph: Aquarium de Paris-Cinéaqua
Photographer: Martina Nicolls
Martina Nicolls: SIMILAR BUT DIFFERENT IN THE ANIMAL KINGDOM