Fish avoid a shark near Heron Island, Australia

Fish avoid a shark near Heron Island, Australia

The waters surrounding Heron Island, off the coast of Australia, beckon divers interested in up-close encounters with marine life in the Great Barrier Reef. Blacktip and lemon sharks swim here, and though they’re not considered aggressive around humans, they are formidable beasts. This shoal of fish parts to allow a shark to pass through: it’s not on the hunt, but the prey-sized fish are not taking any chances.