My fish are minnow type fish. Not big fishies! LOL! Goldfish are popular in those small ponds, too! But the water fowl might see the goldfish so I have the less attractive fishies in my ponds to control the mosquitoes!
I still have to feed them because they've had babies and now I have a lot of fish! They swim in schools! It's really neat to watch them! Rather calm and relaxing! But not enough mosquito larvae to feed them all. I can't let them starve so I feed them fish food once a day! LOL! What's a water garden without the water critters? LOL! The tadpoles were eating my water lilies which is another reason I don't like them. They eat the fish food too, but that I don't mind.