It's not just cows killer whales...

Spotted by JuliaM in National Geographic News:

The death of a British marine biologist in Antarctica last month [July 22] is thought to be the first human fatality caused by a leopard seal (Hydrurga leptonyx). But scientists fear further seal attacks as the number of people working in the region continues to rise*.

Kirsty Brown was dragged underwater by the seal while snorkeling near Rothera research station on the Antarctic Peninsula. Horrified colleagues from the British Antarctic Survey (BAS) scrambled a rescue boat and managed to pull Brown from the water. Despite trying to resuscitate her for an hour, the station doctor was unable to save the 28-year-old...

See also Killer whale 'thrashed trainer to death'

* See also "Number of humans killed by Martians set to rise after Earth's Spacefleet invades Mars"