Alex Mustard / Herbivorous blue tang (Acanthurus coeruleus) swimming through the rigid branches of a pillar coral (Dendrogyra cylindrus) East End, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Pete Oxford / French Grunt (Haemulon flavolineatum) on Pillar Coral (Dendrogyra cylindrus). Sian Ka'an Biosphere Reserve, Mahahual Peninsula, Quintana Roo South Yucatan Peninsula, Mexico.

Doug Perrine / Divers looking at Pillar coral {Dendrogyra cylindrus} Virgin Islands, Caribbean