Yoma Danio

Adults grow up to 6 cm in length. Their coloration is predominantly silvery with slight blue hues. In dominant males, the fins may acquire a noticeable orange color. The fish's body is adorned with yellow specks. Sexual dimorphism in this species is weakly expressed: differences between males and females are minimal. Nevertheless, males often display brighter coloration, although they are somewhat smaller in size.

The natural habitats of this species are in Southeast Asia, in Myanmar (formerly Burma). The range is limited to Rakhine State, which is located along the western coast of the country, between the Bay of Bengal and the Arakan Mountains (Arakan Yoma). Here, the fish are found in rivers and streams flowing down the western slopes of these mountains. They prefer shallow areas with rocky bottoms, where aquatic vegetation is typically absent.

This peaceful and active species coexists well with other non-aggressive fish of similar size. However, it should be noted that the high activity of Feegrade's Danio can sometimes create stress for slower tank mates. The fish prefer to stay in shoals, which should consist of at least 10 individuals. Within the group, a hierarchy is established among males, with the dominant male usually having the most saturated and vibrant coloration.

For a small shoal of Yoma Danio, an aquarium of at least 200–250 liters is recommended. For decoration, you can use a dark substrate of various gravel fractions, natural stones, boulders, driftwood, as well as artificial or live plants. It is important to provide enough free swimming space so that the fish can move actively. Keeping this species does not require significant effort or large financial investments. Basic care procedures include standard actions: weekly partial water changes, regular removal of organic waste, as well as monitoring and maintaining stable pH and dGH levels. Preventive inspection of equipment is no less important. Remember that fish are prone to jumping, so a lid on the aquarium will help prevent accidental incidents.

This species of aquarium fish accepts most popular commercial foods. The daily diet can consist exclusively of dry foods, such as flakes or granules, provided they are of high quality and produced by reliable companies.

As with most Cyprinids, female Danios randomly lay eggs during spawning, which are immediately fertilized by males. The incubation period for the eggs is 3 to 7 days, depending on the water temperature. This species lacks parental instincts, so no care for the offspring is shown. Moreover, adults often eat their own eggs, which minimizes the survival rate of fry in a community tank. To preserve the young, it is recommended to use a separate tank of 30–40 liters, which will act as a spawning aquarium, where eggs or already hatched fry are transferred. This aquarium is equipped with a simple air-driven filter with a sponge as a filter element and a heater. An additional light source is not required, and the decoration can be arbitrary. Feeding the young is done with specialized powdered foods or, if possible, Artemia nauplii.

In a balanced aquarium ecosystem that meets the needs of this species, diseases are rare. Most often, ailments are provoked by deteriorating environmental conditions, contact with already sick fish, or mechanical damage. If the fish shows clear signs of illness, medicinal treatment should be applied. More detailed information on symptoms and therapy methods can be found in the “Aquarium Fish Diseases” section.

When selecting individuals, attention should be paid to the overall activity of the shoal in the aquarium. Healthy fish should show curiosity, be constantly in motion, and actively respond to feeding. Avoid specimens with signs of emaciation, fin damage, or unusual spots on the body. Since Yoma Danio is a schooling species, it is recommended to purchase a group of 6–10 individuals at once, which reduces stress during relocation. In the store, it is important to ensure that the fish do not show signs of labored breathing or lethargic behavior, as the species can be sensitive to water quality during transport.