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Last Updated: Friday July 23 2010 16:12 GMT

Octopus discovery in Antarctica

Megaleledone selebos octopus, one of the four new species of octopus discovered in the Antarctic

Four new species of deadly octopus have been discovered in the Antarctic.

Researchers say the octopuses, some just 5cm small, have venom which is able to work in sub-zero temperatures.

The creatures drill small holes in their prey, before injecting it with poisonous saliva.

"It was quite remarkable to find how well octopuses have adapted to Antarctic life," said researcher Bryan Fry, from the University of Melbourne in Australia.

It's hoped that the venom can be analysed - and help medical teams in the future.

The research team made their discovery in 2007 during a six-week expedition in the Antarctic.