The Jack Dempsey fish (lat. Rocio octofasciata, earlier called Cichlasoma octofasciatum) is a widely spread tank fish within North and Central America. Because of the fish’s congenital aggressiveness towards its tank mates, the USA aquarists have called it Jack Dempsey by the popular professional boxer’s name.
Fire eel (Mastacembelus erythrotaenia) resembles a true eel, that’s why the fish got its name. However, this fish has nothing in common with eels despite its snake like body and pointed snout. This is a renown tank and commercial fish.
Killifish is not very popular in aquarium husbandry and it is seldom sold in pet shops, though this is the brightest tank fish and a very fascinating one. But it’s not only the rich coloring that makes this fish so attractive. It has rather unusual spawning habit, due to which the fish is called an annotinous one. The fish hatches, reproduces and dies in a period of about a year. In the wild the fish dwells in ephemeral waters, which dry up for a period that lasts about six months.
Badis badis (also known as the blue perch or blue badis) is the most famous Badis genus and Badidae family representative. This is a good-looking dark-blue fish that has been popular among aquarists for several dozens of years already. This calm, not demanding in terms of keeping fish, can be interesting not only for experts but for beginning aquarists as well.