Goldfish can only remember for 7 seconds "is incorrect \xd\ According to Australian media reports on February 18th, this boy named Rory Stokes is a student at the Australian School of Science and Mathematics in Adelaide. Stokes said: "Before, people have heard that goldfish have a memory of 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." \xd\\xd\ Stokes "trained" a group of goldfish to swim to the signal buoy with food, and established a correlation between the signal buoy and the food, which made the goldfish have a certain memory of the two. \xd\\xd\ Stokes first puts a signal buoy in the water and feeds 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' observation, he found that the time for these goldfish to swim to the signal buoy to eat was shortened from 1 minute to less than 5 seconds after three weeks. \xd\\xd\ On the basis of the first 3 weeks of experiment, 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, they still swam to the buoy after "hesitation" for 4.4 seconds, which shows that these goldfish have memorized the connection between food and buoy for at least 6 days. "My research results show that goldfish can remember the information of things around them for at least 6 days. If goldfish are forced to remember by training, they can also prolong their memory. " \ xd \ xd \ Goldfish has the ability to remember complex things \ xd \ xd \ Stokes also conducted several subordinate experiments related to this experiment, which showed that goldfish also has 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 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." \xd\ As far as memory is concerned, fish is closely related to "higher" vertebrates (including nonhuman primates), even better. \xd\ Fish will use things to get food. Many fish send out electrical and electronic pulses to look for prey, and some herbivorous fish take good care of the "vegetable garden"? Of course, some fish have to maintain those "unreliable" relationships in order to fill their stomachs: the wrasse lives by eating dead skin and parasites from other fish. If it bites the skin of the customer carelessly, the customer will abandon it and find another more careful cleaner. \xd\ Many fish can clearly remember where their most satisfied "cleaner" is, which shows that they have amazing spatial memory. For example, they can draw a map to find a shortcut from one place to another. \ xd \ xd \ Fish will use things to get food. Many fish send out electrical and electronic pulses to look for prey, and some herbivorous fish take good care of the "vegetable garden"? Of course, some fish have to maintain those "unreliable" relationships in order to fill their stomachs: the wrasse lives by eating dead skin and parasites from other fish. If it bites the skin of the customer carelessly, the customer will abandon it and find another more careful cleaner. \xd\ Many fish can clearly remember where their most satisfied "cleaner" is, which shows that they have amazing spatial memory. For example, they can draw a map to find a shortcut from one place to another.