During her study of blacktip reef shark behaviour in Tahiti, ethologist Ila France Porcher came across a sick male shark, steadily growing thinner. As she brought extra food and medicine to him, she noticed other sharks showing a remarkable awareness of the situation not normally expected of sharks.

Sighting a sea turtle on a dive is always a pleasure. However, few know much about what they are like as animals. Being reptiles, it is assumed that they are essentially on automatic—emotionless and thoughtless. But we changed our minds about that when Merlin came. Ila France Porcher relays the tale of rehabilitating a sick sea turtle in Tahiti, at a time when turtles were often hunted for food.

As our dive boat glided through Papeete Channel off the northern coast of Tahiti, two distinct spouts appeared on the horizon. We were carefully making our way toward them when suddenly two tails emerged out of the water and then majestically disappeared again. Benoit, our guide, carefully got into the water. He quietly swam in the wake of the whales until finally, he lifted his fist into the air to indicate their presence. Excited about the idea of locking eyes with a 40-ton whale, we divers in the boat donned our masks, snorkels and fins and slid into the Polynesian blue for a unique encounter.