How do fish remember seven seconds?

Fish's memory is only seven seconds. This statement has no scientific basis, but comes from a popular sentence on the Internet, which means that fish's memory is only seven seconds. After seven seconds, they will forget what happened before, so in a small fish tank, they will not feel bored, reflecting loneliness and sadness, but scientists have found that fish's memory is more than seven seconds.

As early as the 1960s, when chemistry began to intervene in neurobiology, people had studied the memory ability of goldfish. 1965, researchers at the university of Michigan made an experiment with goldfish. They put the goldfish in a long fish tank and then shoot a light at one end of the fish tank. Twenty seconds later, they released an electric shock at the end of the fish tank that emitted light.

Soon, the goldfish formed a memory of electric shock. When they see the light, they quickly swim to the other end of the fish tank before the electric shock is released into the water to avoid the electric shock. The scientists who designed the experiment found that through reasonable training, these goldfish can remember the skills of avoiding electric shock for as long as 1 month.

Life habits of fish

Habit: Fish inhabit water, and the depth, temperature and salinity of the water in which fish inhabit vary according to species and growth environment.

Feeding habits: fish are warm animals, and their body temperature will change with the change of water temperature. So their eating habits will also change with the change of water temperature. Some fish are omnivorous, eating both animal food and plant food; Others are carnivores, feeding on small animals; Others are vegetarians, feeding on phytoplankton or organic waste.

Reproductive habits: Different kinds of fish have different reproductive habits. Some fish lay eggs in water, while others lay eggs in gravel or aquatic plants. Some fish will experience viviparous, that is, fertilized eggs will hatch into young fish in the mother before they are produced.

Group habits: Many fish like to swim in groups, which helps them to cooperate in finding food, avoiding predators and breeding in the water.