Why a rise in temperature is bad news for these Antarctic sea creatures

Meet the sea creatures living in "the coldest water in the world".

Certain types of sea animals have evolved to survive in the super-cold Antarctic waters, but warming water temperatures might be making them vulnerable.

Shell-less snails, silver sea slugs and some kinds of fish used to living in cold water, but which will find it really hard to adapt.

BBC reporter Justin Rowlatt went to the Antarctic learn about these species.