Antarctica’s Icefish keep from freezing thanks to special proteins


Living way down south, past the tropical parts of the globe and deep in the freezing cold waters of Antarctica, are some pretty amazing fish. Temperatures of -1.8°C should be enough to freeze a fish, but species in Antarctica avoid this fate of becoming a fish-icicle. These fish have an antifreeze protein, called antifreeze glycoprotein (or AFGP) that prevents their body fluids from freezing. These natural antifreeze proteins are not only fascinating because they help fish live in icy waters they could also help humans tackle the tough challenge of frost burnt frozen food. But don’t go running to the frozen food section of the grocery store just yet, there is still a lot more research that needs to be done before you can find fish antifreeze protein in your ice cream!

Photo Credit: Uwe Kils

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