Fierce leopard seal displays its two-inch teeth when hunting down a penguin

As any professional photographer will tell you, it can often be hard to get your subject to crack a smile.

The leopard seal's two-inch teeth look like they are about to take  the lens off the camera in this image taken by Amos Nachoun and his team in Antarctica

However, there was no such problem for Amos Nachoum when he encountered this 12ft leopard seal.

As he bravely edged his camera close to the fearsome predator's face, it obligingly opened its jaws and showed off a fine set of 2in razor-sharp teeth.

An experienced photographer of underwater wildlife, Nachoum spotted the seal as it hunted penguin near Pleneau-Island in Antarctica's Southern Ocean.