While most people believe that the attention span of a goldfish is a few seconds this has been proven wrong. A study done by the School of Psychology at the University or Plymouth in 2003 proved that the attention span of a gold fish is three months.
EDIT: The attention span and memory span is two different
things! The memory span has been proven not to be 3 sec, but up to
3 months. The attention span however for a fish is very short as
they tend to get bored easy.
Most bielieve 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