by Broken Sphere
In 2006, Dr. Richmond Loh, an Australian veterinarian said that fish could be trained to push levers to get their food, and their memory for that behavior lasted as much as three months.
In 2008, a 15-year-old kid in Australia tested the famed 3 second memory span of a goldfish by feeding a few test subjects next to a red Lego. After a while, the fish started to wait by the Lego for their food, and even if he took the Lego out of the tank and put it back in, they remembered that it was where the food came from. Not bad for a high school kid.
In 2010, Dr. Kevin Warburton, a researcher for the Charles Sturt University in Australia stated point blank that after 15 years of researching fresh water fish, fish are anything but dumb. They use their memories to study how to better prey on other fish. If they are attacked by a predator (even a human’s fish hook), they will remember to avoid the predator for months after it happened. Sometimes they even deceive their opponents when fighting.
All in all, it looks like freshwater fish are pretty smart. At least in Australia!
