At the bottom of the ocean, there are brine pools that have a salinity level three - eight times the usual sea level. When a Cutthroat eel gets too close it goes into toxic shock and is lucky to make it out alive. Subscribe: bit.ly/BBCEarthSub #BBCEarth #BluePlanetII #Eel Watch more: Planet Earth bit.ly/PlanetEarthPlaylist Blue Planet bit.ly/BluePlanetPlaylist Planet Earth II bit.ly/PlanetEarthIIPlaylist Planet Dinosaur bit.ly/PlanetDinosaurPlaylist Taken From Blue Planet II This bold cinematic experience takes viewers on a magical adventure across the greatest, yet least known, parts of our planet – our oceans. Since Blue Planet aired in 2001, our understanding of life beneath the waves has completely changed. Travelling from the icy polar seas to the vibrant blues of the coral atolls, this series shares these astonishing new discoveries. Meet the strange octopuses lurking in the depths of the Antarctic Ocean. Watch giant trevally fish lea...