A Few More Colorful Freshwater and Aquarium Fish to Check Out Cardinal Tetra very similar to the popular neon tetra, thee small schooling fish have bands of bright red and neon blue Zebra danio silver or orange with dark stripes Florida flag fish Green, red, or orange with iridescent white polka dots. The neon tetra is one of the most recognizable freshwater fish out there!. The first thing you’ll notice about this fish is the long dark streaks that run over their eye.
