This is the amazing moment a giant whale shark is captured looming beneath a boat full of unsuspecting tourists. <br /><br />The enormous whale shark - the world's largest species of fish - appears to dwarf the boat as it floats just below the surface in a crystal clear sea. <br /><br />The extraordinary image was taken by Tom Cannon, 26, earlier this week off the coast of Western Australia and captures the gaping abyss of the whale shark's giant mouth. <br /><br />Tom said: "The animal in the picture is what is called a whale shark and is the largest fish on the planet.
