Killifish are widespread throughout Asia, South and North America, Africa and parts of Europe. They are lavishly colored and popular amongst hobbyist in the word because they are easy to keep in your freshwater aquarium. They come in red, blue and orange colorations.
Tropical Fish for Freshwater Aquariums: Neon Blue Goby, Stiphodon sp.
Many Gouramis have a feeler barb at the front of their pelvic fins. They are almost the perfect aquarium fish as they are colorful, active, entertaining, are easy to care of and are hardy in freshwater aquariums. They come in many different stunning color variations like blue, gold, neon and sunset.
1 Live Blue Lobster 2 5" for Freshwater Aquarium Fish | eBay
The discus fish are a genus of Cichlids, which are native to the Amazon River basin. Their bright colors make them popular as a great choice for freshwater aquariums. Their brain pattern marking and colors range from reds, oranges, browns, creams and brilliant shades of bright blue.
Freshwater Blue Lobster And Angel Fish? | My Aquarium Club