BEFORE AND AFTER Healthy coral are full of color, like the fire coral seen on the left. But stressors, including overly warm ocean water, cause symbiotic algae to abandon coral tissues, bleaching them (right).
XL Catlin Seaview Survey
A Maori wrasse (Cheilinus undulatus) protrudes its jaws forward to help the fish catch a meal. This jaw-stretching strategy has become more dramatic and widespread over the last 100 million years.