Chris Newbert / Right-handed Hermit Crab (Paguritta sp) colony in Hump Coral (Porites sp), Solomon Islands

Chris Newbert / Hermit Crab (Paguritta gracilipes) in Hump Coral (Porites sp) 30 feet deep, Solomon Islands

Christian Ziegler / Hump Coral (Porites sp) growing directly under Red Mangrove (Rhizophora mangle), Bastimentos Marine National Park, Bocas del Toro, Panama

Christian Ziegler / Hump Coral (Porites sp), Bastimentos Marine National Park, Bocas del Toro, Panama

Christian Ziegler / Hump Coral (Porites sp), Bastimentos Marine National Park, Bocas del Toro, Panama

Pete Oxford / Clubbed Finger Coral (Porites porites), Bonaire, Netherlands Antilles, Caribbean

Jeff Rotman / Shallow Coral Reef table, Red Sea, Egypt

Jeff Rotman / Coral Reef table, with reflections from the surface, Red Sea, Egypt

Jeff Rotman / Prickly Alcyonarian coral (Dendronephthya sp) Red Sea

Jeff Rotman / Shallow Coral Reef table, with reflections from the surface, Red Sea, Egypt

Jeff Rotman / Shallow Coral Reef table, with reflections from the surface, Red Sea, Egypt

Fred Bavendam / Hump Coral (Porites sp) one healthy, left, and the other badly bleached, Lembeh Strait, Indonesia

Chris Newbert / Coral (Alveopora sp) polyps, Red Sea, Egypt

Chris Newbert / Harlequin Ghost Pipefish (Solenostomus paradoxus) female in front of Hump Coral (Porites sp) 80 feet deep, Solomon Islands

Chris Newbert / Star Horseshoe Worm (Pomatostegus stellatus) growing in Hump Coral (Porites sp) 40 feet deep, Solomon Islands

Fred Bavendam / Clubbed Finger Coral (Porites porites), South Caicos, British West Indies

Fred Bavendam / Hump Coral (Porites sp) colony, part of it exhibiting bleaching which occurs when a coral expels its Zooxanthellae possibly due to heat stress, Indonesia

Fred Bavendam / Hump Coral (Porites sp) colony, part of it exhibiting bleaching which occurs when a coral expels its Zooxanthellae possibly due to heat stress, Indonesia

Christian Ziegler / Hump Coral (Porites sp) and tube songe, Bastimentos Marine National Park, Bocas del Toro, Panama

Christian Ziegler / Hump Coral (Porites sp) with Feather Duster Worm (Sabellidae) filter feeding, Panama

Christian Ziegler / Hump Coral (Porites sp) growing directly under Red Mangrove (Rhizophora mangle), Bastimentos Marine National Park, Bocas del Toro, Panama