Bubble coral  (Plerogyra sinuosa)

Bubble coral

© Tim Wijgerde

Bubble coral, tentacles visible

© W.A.N.T. Photography / Animals Animals

Bubble coral colony

© Gavin Parsons / www.ardea.com

Acoel flatworms commensal on bubble coral

© Patricia Danna / Biosphoto

Bubble coral with commensal shrimp and flatworms, skeleton structure visible

© David Fleetham / naturepl.com

Bubble coral with commensal coral shrimp

© Reinhard Dirscherl / Biosphoto

Bubble coral with commensal crab

© Patricia Danna / Biosphoto

Bubble coral with commensal shrimp and flatworms

© Becca Saunders / www.ardea.com

Large colonies of bubble coral

© Odile Gautier / Biosphoto

Bubble coral with large whip goby

© Odile Gautier / Biosphoto

Bubble coral with orangutan crab

© Mark Harris / londonfreediving.org

Bubble corals surrounding giant clam

© Odile Gautier / Biosphoto

Bubble coral, white from bleaching

© Frédéric Pacorel / Biosphoto

Bubble coral showing skeleton

© Valerie Taylor / www.ardea.com

Bubble coral colony

© Constantinos Petrinos / naturepl.com