I feed my cichlids a bunch of bugs. I live in Florida so there is a wide variety to choose from. I have never fed them Ladybugs and I have never seen a Japanese Beetle so I don't know if either one are harmful to fish. I know to stay away from brightly marked critters though. They usually have a bad taste or poison. Don't make those Trimac X Snooks your guinea pigs! I want to see them grown out!