The leopard seal (Hydrurga leptonyx) is the second largest species of seal in the Antarctic. It is most common in the southern hemisphere along the coast of Antarctica and on most sub-Antarctic islands, venturing occasionally to New Zealand's coastlines. The leopard seal is large and muscular, with a dark grey back and light grey on its stomach and speckled black spots which earn the seal its common name. Although it is a true seal and swims with its hind limbs, it has powerful and highly developed forelimbs similar to sea lions, giving it a similar maneuverability, a classic example of convergent evolution, and like the eared seals, the leopard seal is a shallow water hunter. The leopard seal has an unusually loose jaw that can open more than 160 degrees, allowing it to bite larger prey.