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.
i was always told that the attention span of a goldfish was 3 seconds.
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.