Do fish have a memory? How long does a fish have a memory

No. Fish have extremely low intelligence!!

According to the Proceedings of the National Academy of Sciences, fish have memories that can be as short as three days and as long as at least three months, depending on the type of fish. Fish memory generally lasts for 1-3 months, and with training, memory will also be strengthened. Usually this animal has a relatively short memory of an event, but it can be remembered better by repeating it after multiple contacts.

Through experiments, it has been found that when the goldfish is released again after 20 seconds, it will appear frightened and dodge, and the fish will still have a tendency to avoid after a month of testing.

Fishes are the oldest vertebrates, and the earliest known fish fossils were found in the Late Cambrian strata about 500 million years ago. At present, there are about 32,100 named fish species in the world, mainly distributed in marine and freshwater, and two-thirds of the fish in the ocean. Most of the fish are cold-blooded, very few are warm-blooded, breathe with gills, have jaws and fins, and the extant fish can be divided into two populations: cartilaginous fish and bony fish.

The paradise fish is a famous aquarium fish, and in addition to its beautiful appearance, it also has an amazing memory. Paradise fish have a strong sense of curiosity, and if they encounter a new strange fish in the pool, they will swim around curiously, secretly looking at their new companion until they get bored. When the Paradise Fish re-encounter with an unfamiliar fish that they have already explored before, they will quickly discover that it is an old acquaintance, and they will lose interest in communicating and swim away on their toes.

For such a memory, the paradise fish can be kept for three months.

As distant cousins of goldfish, zebrafish are a common model organism. They can quickly learn how to walk the maze, how to forage for food based on the sound signals provided, memorize the shape of a predator, and even dodge electric shocks according to prompts, etc. Experiments have confirmed that there are similarities in the memory characteristics of zebrafish.

When the stress is too high, the zebrafish will have poor memory and be distracted, affecting the efficiency of learning. As zebrafish age, their memory skills also weaken.

It is wrong for a fish to remember only seven seconds.

In fact, if the "fish memory has 7 seconds" is taken as a scientific conclusion, many questions will arise. Can memory be accurate to the second? If the average memory of a fish is 7 seconds, then don't some of the dumber fish have only a memory of seconds?

When these "stupid" fish take a bite of food, will they instantly forget what they are holding in their mouths?

Fortunately, fishes have a rather unique evolutionary status as the earliest species of vertebrates, so there is a lot of scientific research on fish memory. Although the types of fish used as experimental materials are different, and the methods and specific purposes of the experiments are different, almost all studies on fish memory show that fish memory is much longer than 7 seconds.

For example: Paradise Fish – also has a strong memory. When this fish encounters a strange goldfish in the pool, it will swim around curiously, looking at the new strange neighbor until it loses interest.

If the Paradise Fish and the Goldfish meet in the tank for the second time, they will quickly discover that each other is an old acquaintance and lose interest in exploring. Experiments have found that such memory can be maintained for at least 3 months.

Zebrafish – is also a fairly intelligent animal that can accomplish a wide variety of tasks. In 2002, several researchers at the University of Toledo in Ohio, USA, tested zebrafish for memory. During training, they would give the zebrafish a red light as a signal before feeding, and 10 days after the training was stopped, the zebrafish still remembered that the red light was a sign indicating that it was time to eat [5].

In the lab, zebrafish can also quickly learn how to walk the maze [6], search for food based on sound signals [5], memorize the shape of predators, and dodge electric shocks according to prompts.

1. Most people think that the memory time of goldfish is only 7 seconds, but in fact, the memory time of goldfish is not only a few seconds long, In 2003, the School of Psychology of Pulley Sedan Zhengfang University conducted an experiment on the memory time of goldfish, and the results proved that the memory time of goldfish has at least 3 closed and slippery moons, and can distinguish the shape, color and sound of different objects, the experimental method is to fix a lever in the water, this lever is only 1 hour a day in the water, Train the goldfish to push this lever at this specific time, if the goldfish can remember this time and be able to push the lever, it will get food as a reward, the result is that the trained goldfish quickly know to push this lever at the exact time in order to get food, they can eat food at a specific time;

2. Fish, as an early species of vertebrates, have a rather unique evolutionary position, so there are many scientific studies on fish memory, although the types of fish used as experimental materials are not the same, the experimental methods and specific purposes are not the same, the task of testing human intelligence is obviously too difficult for fish, so it is really a bad record for the fish, which may also be one of the reasons for the origin of people's views on fish memory.

At present, there are no definite studies to prove that fish have a memory of only 7 seconds, but many studies have found that fish have the best memory among animals.

In fact, fish can also get bored, because they really have more than 7 seconds of memory. Fish are the oldest members of the vertebrate family. As early as 500 million years ago, ichthyosambas have appeared, after such a long time of evolution, fish have long become a big family, almost all aquatic environments on the earth can see the figure of fish, rough estimates, the earth has more than 20,000 species of fish, and the rate of more than 100 species per year is increasing.

The "background" of fish is so large, of course, there are not a few people who study them. There are many studies on fish memory, but none of them have shown that fish have memories of only 7 seconds.

For example, the paradise fish in the ornamental fish not only has a super high appearance, memory is also better than the fish, they are born curious baby, if the paradise fish in their own territory to see the new stranger, it must be around the "newcomer" taste, and so on the paradise fish to see the newcomer carefully and clearly, it will not hesitate to abandon the "newcomer".

If the Paradise Fish and the "newcomer" meet again after a while, the Paradise Fish will not be interested in the "newcomer", because it will soon find that it has already picked up each other's family background, and there is nothing new about it.

Experiments have shown that the memory of the paradise fish is also at least 3 months. Experiments have also shown that fish memories are likely to be long-term. So, "the memory of the fish is only 7 seconds" is a beautiful mistake, and the fish will be bored, but it is much better than having an empty head and no memory!