I had a 55 gal aquarium in college that we stocked with native fish. The most interesting for me was the gar which would float almost motionless up to its prey before quickly snapping them up. A couple of Rio Grande Cichlids were some of the most beautiful. Had a 12" bass which could barely turn around in the tank. We'd seine minnows of several varieties and bluegill and dump dozens into the tank at once. The permanent residents would gorge themselves, sometimes swimming around for hours with victims in their mouths. And then, over the next several days the remaining minnows and bluegills would slowly disappear as tummies got larger. A great experience.

3/4 acre pond