Question

How can fishes survive in very cold regions when water is frozen ?

Answer 1

Answer: Due to anomalous expansion of water, the surface water turns into ice. This prevents the lower layers of water to come in contact with the outer cold environment. So, normal temperature is maintained. Thus, fish survive in very cold regions.

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Answer 2

When water boils at a certain temperature it turns into steam. ... Underneath the frozen upper layer, the water remains in its liquid form and does not freeze. Also, oxygen is trapped beneath the layer of ice. As a result, fish and other aquatic animals find it possible to live comfortably in the frozen lakes and ponds.