"The Antarctic icefish live in water colder than freezing — 2 degrees below zero Centigrade.
Ocean water doesn’t freeze at this temperature because it’s full of salt. The blood of the icefish is less salty than seawater; instead, it keeps itself from freezing by using ice proteins, sometimes called antifreeze proteins, that attach to ice crystals forming in the blood stream.
Once the ice crystals are coated with antifreeze protein, they can’t stick together, so they don’t grow. The icefish of the Antarctic have used this adaptation to become very successful — making up 95% of the fish biomass around Antarctica.
Photo: Uwe Kils”
There is a magical lake in the Rock Islands of Palau where you can swim with the jellyfish worry-free.
The lake became a tourist attraction and people can go swimming and snorkeling with them.
The jellyfish lost their stingers over the years because they don’t need them to fight off predators.