There‘s a breathable liquid lhat aletwsv‘”m ª““ you In breathe normally and safely even when you are submerged h It Now You Know Source) NOW I CAN BE A TRUE MERMAID I actually did a report on this last year! The substance is called perfluorocarbon and because of its unique nature, it can hold enough oxygen inside of it for you to breathe it. You can breathe safely while inside it, but sometimes the transition from breathing in the pertluorocarbon anc - iFunny