Gold fish?
I'm pretty sure all fish have a memory of about 10-30 seconds. They aren't really that bright.
it is until they have sex then they forget everything.
The goldfish It is said a goldfish only has a memory span of just a few seconds
Probably the king betta because it's the largest and in most cases the larger the fish, the smarter
the normal memory span for a person is about 30 years
Giraffes really have a very short Memory Span ..so short that it would be difficult to say.
It depends on the human's memory strength.
Yes, but it requires constant bribes, and goldfish only have a memory span of three months. Few people have taught their fish tricks,
A finch's memory span is within a couple of months.
Taking their life span into account their memory lasts about the same as yours and mine. They learn very quickly, and remember things like hiding places in their environment, who feeds them, what a net does and many other thing that would be necessary for survival in the wild. They are relatively short lived fish so obviously the length of time their memory lasts would also be limited by their lifespan. A fish that learns what a net does never forgets it for the rest of its life.
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