One tank that would be dope would be a tank I saw today. I went deep sea fishing, and the place I went to has a massive 10āx4āx3ā they grow out fish for local aquariums such as the Birch Aquarium and Legoland Aquarium. They have a small group (5-6) of small Spanish mackerel, 2 calico bass, 2 Black and Yellow Rockfish, 1 Rosy Rockfish, 3 Blue Rockfish, 2 Sanddab, 1 large Whitefish, 2 Opaleye, a few large crabs, 4 Pacific Sculpin, the cleanup crew (includes starfish), and a baby leopard shark. Itās all native fish. Itās sick. Minimal rock decorations, 2 large strands of kelp, and tons of natural algae and āplantā matter. Didnāt take any pics. Shouldāve. It sounds like it looks cramped, but that tank is massive, and most fish are under 1ā.