Winners Gallery

"The behaviours exhibited by grey whales in their mating and calving lagoons in Baja California, Mexico, are unlike anything else seen around the world," says Subramaniam. "They have a remarkable curiosity, actively approaching small fishing skiffs to see what is happening. I shot this on an incredible morning, when we had over 20 whales around our boat. The four that you see in this image were the initiators, after which all the others wanted in on a piece of the human action. To this day, this remains the most incredible wildlife interaction I have ever had."