It's part of theories that the 'internal brain map' of fish has evolved over the years.
The theory that goldfish can only remember for three seconds may not be true.
An Oxford University study found scientists were able to 'brain train' the popular pet.
They made goldfish travel a certain distance for a reward, and they remembered how long to swim for.
It's part of theories from scientists that the 'internal brain map' of fish has evolved over the years.