I don't have to worry about predators, I just have to worry about fishing birds out. Its really sad. I have to drag like 10-12 birds out of my pond every year. And usually a couple squirrls. I think my fish drag them down, but thats just me. I put a frog in once and they pack hunted it.... I dunno if my fish are quite freindsly to other animals. But towards eachother its kinda incredable. Once one of the dumb koi i had jumped out of the pond. I think he was layin out on the ground for 5-10 minutes before i wandered outside. Dropped him back in and tried to get him to breathe again. After about 10 minutes of moving back and forward the other fish came up and looked after I let go they swam really close to him so he didn't float back up. It was pretty damned incredable. I love my fish. But back to the point, I don't think they have any predators around here other than cats and most of my fish are to big to get scooped up. So I just need to find someplace for them to go. I took a batch of 1"s to the fish store once a year or so ago but they went out of busniess so i don't know what to do now lol. o well