Fish all eat them and their larvae..
Unless you have extremely shallow sides that can't accomodate a fish

Even in the shallowest of areas a minnow can usually get in, my goldfish will
go almost anywhere to get something they really like to eat like larvae and
worms... those guys are pigs.... I normally don't feed them, they are on their
own out there... mean fishy mommy lol.
Colleen
Zone 5 CT