Where do Fish Go When it Freezes Outside?

Fish are less active in the cold. In this resting state, hearts of fish slow down, their needs for food and oxygen decrease, and they move about very little. The layer of ice that forms on top of a lake, pond, river or stream provides insulation that helps the water-body retain its heat. Because warm water sinks in cold freshwater, fish in these water-bodies gather in groups near the bottom of the water-body.

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