I don't see ram's in the pic, but the auratus and blue zebras definitely require a much larger tank. The auratus in particular need at least a 75 gallon of their own, or a larger tank if keeping other species like the blue zebras with them. Males claim about 4-5' of floorspace in every direction as their territory. The yellow Lab's aren't nearly as aggressive, and would actually be alright with the livebearers, but they will all eat the live plants. Even the relatively mild yellow Lab's will need a bigger tank when they grow larger, and ideally should be kept as a trio or quad (1m/2-3f).