@TaylorW, good read! This part was particularly interesting...thanks for sharing!
For a start, Dr Brown says the three-second memory of goldfish is a myth: "It's completely ridiculous that an animal could survive without a memory."
Fish are so clever, Dr Brown says, that those schooled in survival skills can even teach their captivity-raised peers how to get by in the sea.
To help prove his theories, Dr Brown put rainbow fish into a tank with a mock trawler net with a single hole and watched how long it took them to find an escape route.
"Without any prior experience the fish learned where the hole was in about five runs," he says.
A year later, the same fish managed to find the hole on their first try, which Dr Brown says shows they easily recalled the skills they had learned.