Multiple choice general knowledge

Which fish in Antarctica has antifreeze?

  1. The millennium fish

  2. The ice fish

  3. Every fish

  4. The rainbow fish
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Antarctic notothenioid icefish have evolved antifreeze glycoproteins that bind to ice crystals in their blood, preventing freezing and allowing survival in subzero waters. This adaptation is crucial because Antarctic seawater can reach -1.9°C, below the freezing point of pure water. Other Antarctic fish lack this specialized adaptation.

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