Alex Mustard / A stand of Pillar coral (Dendrogyra cylindrus) growing on a coral reef, East End, Grand Cayman, Cayman Islands

Alex Mustard / View down on a pillar coral (Dendrogyra cylindrus) growing on a coral reef, with blue tangs. Jardines de la Reina, Gardens of the Queen National Park, Cuba. Caribbean Sea.

Linda Pitkin / Maze coral (Meandrina meandrites), detail Bonaire, Leeward Antilles, Caribbean.

Ingo Arndt / Maze Coral (Meandrina meandrites) from Colombia, Senckenberg Museum, Frankfurt, Germany

Roberto Rinaldi / Brain coral inside an underwater crevasse with a scuba diver beyond, Flinders Reef, Australia Model released.

Alex Mustard / Pillar coral (Dendrogyra cylindrus) killed by Stony Coral Tissue Loss Disease over the period of a week in 2021. Before and after image taken a few years apart, Grand Cayman, Cayman Islands, Caribbean...

Joel Sartore / Photo Ark / Smooth flower coral (Eusmilia fastigiata) portrait, Riverbanks Zoo and Garden, South Carolina. Captive.

Joel Sartore / Photo Ark / Smooth flower coral (Eusmilia fastigiata) close up portrait, Riverbanks Zoo and Garden, South Carolina. Captive.

Claudio Contreras / Smooth flower coral ( Eusmilia fastigiana ) with open polyp at night, Xkalac Reefs National Park, Caribbean region, Mexico.

Claudio Contreras / Tiger grouper (Mycteroperca tigris) in Pillar Coral (Dendrogyra cylindrus), Jardines de la Reina / Gardens of the Queen National Park, Caribbean Sea, Ciego de Avila, Cuba.