undersea lake

'Bathe desperately' kills most incoming swimmers
The underground lake at a depth of more than 900m under the Gulf of Mexico makes most animals unbearable due to its salty and toxic nature.
The lake area under the ocean carries deadly toxins
The water in the lake in the Gulf of Mexico is 5 times more salty than the surrounding water, containing a lot of metal and hydrogen sulphide which can be fatal when swimming here.