Deep-sea brine pools are toxic to marine animals due to high salinity and anoxic properties. For this cutthroat eel, this could mean toxic shock and possibly death. Explore more on Blue Planet II now streaming on discoveryplus. Download and subscribe at our link in bio. #discoveryplus #bbc #planetearth #planetearth2 #blueplanet2 #eel #deepsea #deepseacreatures