Hello! So I'm breaking out my old 55 Gallon tank that I used to use for native saltwater, and am going to use it for a native fresh water tank. Issue is deciding on what I want to put in there! I'll be in New Brunswick Canada (home) for the summer and that's when i'm going to catch the natives for this tank. So some options. Option#1: Ecosystem tank Basically this would be a bunch of small critters mimicking an ecosystem. Breeding Brook Stickleback pair Slimy Sculpin Tons of these in a river in my backyard, the larger brook trout feed on them. A bunch of Northern redbelly dace, or similar minnows bugs & snails(non predatory). Option #2: Small mouth bass If I was to have a small mouth bass, what else could I have in here as well? I'm also concerned on the size of the tank, I'm not sure it's big enough for a small mouth bass. Option #3 Yellow Perch Same as option #2, just wondering what would be able to fit in here with it. Option #3 Brook/Rainbow Trout Same as option #2 and #3, just wondering what else I could put in there. They're lots of brook trout around, and a fair bit of rainbow trout. There are pumkin seeds around here, but they're quite rare, I'd keep one of these guys if I could find one. There is also crayfish around here, but I'd be worried about them being able to live with any of the above without one of them being eaten. Brown Bullheads are also an option . I'd be catching everything during the summer, and move everything with me to my new apartment in the fall. I have lots of experience moving fish, corals and inverts so that part is not an issue. Let me know what you guys think! Also, any suggestions are most welcome. My alternative to a native tank is a cuttlefish or an octopus tank. Edit: There will of course be pictures of the captured fish and the tank as it develops .