The first description of the Denisoni barbus dates back to 1865, but, despite the fact that more than a hundred years have passed since that time, this type of barbus received fame among aquarists only in 1997. Then, at the international exhibition held in Singapore, fish of this species were first presented. This type of barbs got its name on behalf of Madras Governor Sir W.T. Denison.
Denisoni's barbs, despite the fact that their popularity is increasing, are still quite rare fish in ordinary amateur aquariums. This is due primarily to their significant price due to the complexity of the process of breeding and rearing young animals.
These beautiful aquarium fish have an elongated lanceolate body. The main color of their scales is silver-golden. The back of the Denisoni barbs is painted in olive color. The body of the fish in the middle in the length is divided by a black stripe running from the base of the tail through the whole body to the nose (including the eye). Above the black stripe there is a red, running from the nose to the middle of the dorsal fin. The tail of the Denisoni barbs is fork-shaped. On both tail blades there are transverse stripes of yellow and black. The dorsal fin is interesting in the presence of the first red ray. Anal fin, pectoral and ventral fins transparent and colorless. The size of the fish is about 15 cm. The life expectancy of Denisoni barbs is an average of 8 years.
There are no gender differences between male and female barbarian Denisoni. The only thing that can be called is that in them, like in most fish, the female abdomen has a more rounded shape than the male.
The natural habitats of this type of barbus are fast rivers and streams in the mountains of Asia. In addition, Denisoni barbus is found in western India, but in much smaller quantities.
This type of barbus is omnivorous. Wild fish willingly eat worms and insects, as well as plant foods. With aquarium content, feeding Denisoni barbs is very simple. They need a balanced diet, which includes a diverse, medium-sized, live food (periodically can be replaced with ice cream), as well as dry food with plant components. It can be both granules and flakes.
Maintenance and care
For living in an amateur aquarium, this type of fish is quite complicated. Denisoni barbs require a flock of 7-10 individuals, but it is better if their number is greater. They need a large spacious aquarium with a volume of at least 200 liters, and ideally 400 liters, with a lid. Larger sizes are required because Denisoni barbs are very fast fish, and they need room for swimming. The soil in the aquarium can be both small or medium pebbles, and river sand. Any plants are used. Fish are not demanding on lighting. The water in the aquarium with this type of barbus should be no colder than 22-24 degrees and with a hardness of 8-12rH. The reaction is slightly acidic, closer to neutral. Aeration is desired.
At the moment, only one case is known about the successful breeding of the Denisoni barbus in an amateur aquarium. In view of this, there are no clear recommendations for their reproduction. Therefore, you can resort to general rules. The volume of the spawning aquarium should be 200 liters, and the water temperature should reach 28 degrees. To stimulate spawning, a sharp decrease in the acidity of water is used. If spawning has occurred, adult fish are immediately removed from the aquarium. Fry should be fed with ciliates, with the gradual addition of larger feed to them. As the fry grow, the acidity of the water is brought to the required adult fish.