They are both correct, just have different meanings: a few fish means there are more than 2 fish a little fish means the fish is small or a little bit of fish means (for dinner) you would like a small portion of the fish Hope this helps!!

Thank you very much.

a few fish = some (<10) (whole) fish a little fish = 1 small fish OR if you're referring to a fish DISH, this could mean a small amount of food e.g. I would only like a little fish with my potatoes :)