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Most Bizarre Fish You’ve Ever Seen? A diver swims with a huge ocean sunfish, or Mola mola, off the coast of San Diego. They are the largest of the bony fish and often get mistaken for sharks due to their dorsal fins. They feed on jellyfish and plankton and are curious of humans, as seen in the photo. One threat to molas is drift nets, which they often get caught in, and garbage such as plastic bags that they mistake for jellyfish, their favorite food.
Rare and endangered Australian Sea Lions (Neophoca cinerea) swim and play in the shallows of Hopkins Island, South Australia.
A nosy smile -- cool shot by Diederik Huisman. Here's what he said about: "WIth this young male I swam for two hours non stop. It kept on turning, spyhopping and swimming very slowly around me, allowing me to take pictures from many angles. In this shot the young whale seemed to smile inquisitively as it approached me, his eye looking at me with an almost child-like naughtiness".