What is the memory span of a goldfish?

A lot of books say 3 seconds, but the truth is...

A goldfish's memory is 11 months long.

That is the human equivalent to remembering something for over 40 years.

Also, goldfish have been trained to swim through mazes.

Most believe 2 or 3 seconds but it is proven that it is 3 months or so

Look Up comet the gold fish

Proves it is smart