Leopard seal vs. penguin. Seal wins (dramatically).

For humans who prefer the cute cuddly side of nature, the interaction of leopard seals with their gentoo penguin prey can be unpleasant to view. Films on TV and the web have documented the predator "playing" with its victim. The gory photo above depicts the moment a large female seal decapitates a penguin chick. From an impressive photoset captured by a National Geographic photographer who swam with the seals.