Will fish freeze to death in very cold water?

Because the underwater temperature will not drop below zero degrees Celsius.

In winter, the river freezes, fish are underwater, the temperature of the river is below zero degrees Celsius, and the underwater temperature will not be lower than zero degrees Celsius, so it is still suitable for fish to survive. On the contrary, the river was covered with a thick layer of ice, which undoubtedly covered the river with a thick quilt. No matter how cold it is outside, the river under the ice can keep constant temperature, and the fish can still swim around as usual without freezing to death.

The solution of freezing fish in shallow ponds is to raise the water level as much as possible, fertilize the pond appropriately, and try not to fish at low temperature. The pond is too thick to freeze, which is easy to cause hypoxia to fish. At this time, the ice should be broken as soon as possible to achieve the purpose of increasing oxygen for the fish.

Extended data:

Fishbone is divided into cartilage and hard bone according to its nature. Cartilaginous fish keep cartilage for life, because there is calcium precipitation in softness, it is also called calcified cartilage. The bones of teleost are mainly hard bones, which are divided into softened hard bones and periosteum according to different shapes: the hard bones formed by ossification on the cartilaginous primordia are softened hard bones, such as spine, ear bones and occipital bones; Hard bones formed by direct ossification of dermis and connective tissue are called membranous bones, such as frontal bone, parietal bone and branchial lid bone. Fish bones are divided into two parts according to different parts: axial bones and appendage bones.

Qin Chu. Can frozen fish live in a pond? Expert: Fish in water generally don't freeze to death.