what eats fishWhat kind of fish would be cool that eats other fish?

Im looking for a cool fish or whatever thats freshwater that eats other fish.
In one of my tanks i have a albino swimming frog that eats alot of gold fish hes pretty cool and id like to have something that eats fish too.
ok, so you want to buy fish just to let them get eaten...?!?! you have issues maytee!!

i'd suggest a piranha, although it might eat you too :D
you need an oscar!! they are awesome
An Oscar Cichlid would eat small fishies, but might also eat your little frog. They also grow quite large and you would need a big tank, 30 gallon minimum. Most larger cichlids will eat fish, but the same rules apply. ALSO, tank fish who consistantly eat otwhat eats fishher fish can develop liver problems, since the fish that they are eating are also tank raised and have higher concentrations of toxins in their bodies than wild fishies would have.
Oscars, bass, barramundi, gudgeons(gudgeons only grow to 18cm and they are endangered) ask your petstore they should tell u also
large +8":
oscars
jack dempseys
green terrors
texas cichlids
severums
fire eel
bichirs
ghost, clown, black knife fishes

medium 6"- 9":
firemouths
african cichlids
eels
convict cichlids
blue acara

small -6":
jewel cichlids (WARNING: very agressive and territorial)

hope this helps but be careful with jewel cichlidswhat eats fish as they might eat your frog
You might try a leaf fish (Monocirrhus polyacanthus). It closely resembles a floating fallen leaf and sort of drift around the water until it engulfs fish that comes near it.

I'm afraid it may eat your frog as well if it will fit into its cavernous mouth.
Well if your planning on feeding fish to fish, I'd say that's a bad idea and animal cruelty. As for what fish eat other fish, almost all fish will eat other fish if the fish can fit in the other fish mouth. I once had a goldfish eat a betta so anything can happen. I also had a goldfish that ate a goldfish twice his size.