I never find fish that jump out because one of my 4 cats gets to them before I do. I always cover intake tube no matter what the size of the fish. I've even used netting material if I could not find a cover.
I have had fish go into the intake tube as well. Gave up trying to figure out how they managed to do it. Went to lfs and bought a sponge for an AC110 and cut it to fit many of my filter intakes. Problem solved.