Do koi hibernate on their sides?

Koi do not hibernate in the traditional sense, but they do enter a state of torpor in colder months. During this time, their metabolic rate slows down, and they become less active, often resting near the bottom of the pond. While they may occasionally be found resting on their sides, this is not typical behavior and can indicate stress or health issues. It's essential to monitor their environment to ensure they remain healthy during the winter months.