Fish suffocating in the ponds of St. Petersburg

Fish is trying to find access to oxygen in the hole for bathing "walrus" in one of the ponds Victory Park in St. Petersburg.

Winter in artificial ponds city under the ice due to the small amount of water stagnation occur. Especially at this time of suffering small fish in polluted waters, where the image anaerobic (airless) conditions can be released methane gas, as well as in shallow ponds, freezing almost to the bottom. Due to a lack of oxygen becomes fish mortality.

If severe frosts will last a few days, and finally freeze hole, the fish in the pond seems doomed to extinction.