How do you tell the age of a fish?

Question

How do you tell the age of a fish?

Answer 1

Generally, if they're very small, they are also very young.  This is not always the case, as the smallest adult fish is the Paedocypris progenetica, so it's smaller than some newly hatched/born fish.

It's almost impossible to tell the exact age of any fish for the average fish keeper.

Answer 2

idk if you can, you can tell that as they get older the color of the fish fades a little bit, and they dont seem as active.

but im not quite sure.

Answer 3

i dont think you can with most fish. some breeds never stop growing and then their length can tell you roughly. others might loose some of their coloring over time. othewise i don't think you can tell at all. the fish i recently got look the same as the fish i've had for years.