Why is the goldfish's memory only about seven seconds?

Goldfish can only remember for 7 seconds "is incorrect \x0d\ According to Australian media reports on February18th, this boy's name is Rory Stokes, and he is a student of Australian College of Science and Mathematics in Adelaide. Stokes said: "In the past, people have heard that goldfish's memory is less than 7 seconds, so people take it for granted that no matter how small the fish tank is, goldfish can always find new objects and places again and again. "\x0d\\x0d\ Stokes" trained a group of goldfish to swim to the signal buoy with food, and established a relationship between the signal buoy and the food, which made the goldfish have a certain memory of the two. \x0d\\x0d\ Stokes first put a signal buoy in the water and feed these goldfish regularly every day; After each feeding, Stokes will delay spraying food around the signal buoy for about half a minute. After three weeks of observation, he found that the time for these goldfish to swim to the signal buoy to eat was shortened, from the original 1 minute to less than 5 seconds after three weeks. \x0d\\x0d\ On the basis of the experiment in the first three weeks, Stokes will take away the signal buoy for feeding goldfish; Six days later, Stokes put the signal buoy back into the water again. Although these goldfish haven't seen the buoy for almost a week, after "hesitating" for 4.4 seconds, they still swam to the buoy, which shows that these goldfish have remembered the connection between food and buoy for at least 6 days. "My research shows that goldfish can remember the information of things around them for at least 6 days. If goldfish are forced to remember through training, they can also prolong their memory. " \ x0d \ x0d \ goldfish has the ability to remember complex things \ x0d \ x0d \ Stokes also conducted several subordinate experiments related to this experiment, which showed that goldfish also have the ability to distinguish complex things-if goldfish found that there was no food at the previous buoy, they would immediately swim to the second buoy to look for food. "I found through experiments that goldfish can observe and remember complex things, and they can keep those remembered information in memory for several days." \x0d\ As far as memory is concerned, fish is closely related to "higher" vertebrates (including nonhuman primates), even better. \x0d\ Fish will use things to get food. Many fish send out electric and electronic pulses on the journey to find prey. Some herbivorous fish take care of the "garden" carefully. Of course, some fish have to maintain those "unreliable" relationships in order to fill their stomachs: wrasse live by eating dead skin and parasites from other fish. If it accidentally bites the customer's skin, the customer will abandon it and find 1 to be more careful. \x0d\ Many fish can clearly remember where their most satisfied "cleaners" are, which shows that they have amazing spatial memory. For example, they can draw a map and find a shortcut from 1 to another 1. \ x0d \ x0d \ Fish will use things to get food. Many fish send out electric and electronic pulses on the journey to find prey. Some herbivorous fish take care of the "garden" carefully. Of course, some fish have to maintain those "unreliable" relationships in order to fill their stomachs: wrasse live by eating dead skin and parasites from other fish. If it accidentally bites the customer's skin, the customer will abandon it and find 1 to be more careful. \x0d\ Many fish can clearly remember where their most satisfied "cleaners" are, which shows that they have amazing spatial memory. For example, they can draw a map and find a shortcut from 1 to another 1.