How do the fish living in Antarctic waters manage to keep their body fluids from freezing?
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Fishes are cold blooded which means that they cannot regulate body temperature. Fishes use many strategies to cope temperature of arctic waters. Fishes living in extreme cold regions can produce glycoproteins which is an antifreeze agent in their blood, that circulate through the blood and prevent it from freezing. For example, antifreeze agents are present in Antarctic toothfish. Some fishes can produce heat from their swimming muscles.
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