Betta uberis

Adult Betta uberis grow up to 4 cm (1.6 inches) in length. Their body is elongated and slender, with a rounded caudal fin. The dorsal and anal fins are not tall but extend from the middle of the body to the caudal peduncle. Young individuals have a red coloration, which darkens with age, acquiring shades of burgundy. Bluish tones appear on the scales and fin rays. Males are distinguished by brighter coloration than females.

The natural habitat of these fish is the island of Borneo (Kalimantan) in Southeast Asia. They prefer peat swamps and associated streams located in lowland tropical forests, where light on the water surface is subdued. The water in these bodies of water has a rich brown color due to the abundance of tannins formed by decomposing organic matter. Such waters are characterized by low mineral salt content and a pH that can drop to 4.0. The bottom is usually covered with fallen leaves and snags.

In small aquariums, males may conflict with each other, engaging in skirmishes that typically do not result in serious injuries. Nevertheless, the losing, weaker individual will be forced to seek shelter and avoid encounters with the dominant male. It is recommended to keep these fish individually or in small groups with a predominance of females. They get along well with peaceful, non-aggressive species that can thrive in similar water conditions.

An aquarium of at least 40 L (10 gallons) is required for a single Betta uberis. It is crucial to ensure a suitable aquatic environment in the aquarium with minimal pH and dGH values. Special attention should be paid to water preparation during regular aquarium maintenance. Typically, reverse osmosis units or similar equipment are used to obtain soft water. To maintain good water quality, an effective filtration system is necessary, combined with regular removal of organic waste such as excrement and leftover food. It is important to use gentle filtration to avoid creating a strong current, as fish originating from stagnant waters can experience stress from intense water flow. The aquarium decor can be varied, but the fish look most natural in subdued lighting, among driftwood and shade-loving plants. Dried leaves from certain trees are often used to impart the chemical composition characteristic of their natural habitat to the water. More detailed information can be found in the article “Which tree leaves can be used in an aquarium.”

Individuals raised in artificial conditions become omnivorous. They readily consume most popular commercial foods, whether dry, fresh, or frozen. For optimal nutrition, it is recommended to consider specialized products designed for Betta fish and produced by various manufacturers.

Under favorable conditions, spawning occurs regularly. Like other Betta fish, male Betta uberis build bubble nests. For this, they choose the underside of broad-leaved plants or cave-like shelters. For example, a piece of PVC pipe or an overturned ceramic pot can serve as a spawning site. During nest construction, the male does not allow females near him, but after its completion, his behavior changes, and he begins to actively court the female. The female lays eggs one by one, and the male catches them, fertilizes them, and places them in the nest. The total number of eggs in a clutch usually ranges from 20 to 50. The female does not participate in caring for the offspring; all responsibility for the clutch falls on the male. The incubation period lasts from 24 to 48 hours, after which the fry remain in the nest for another 3–4 days, feeding on the yolk sac reserves. Only then do they begin to swim freely in search of food.

Most health problems in fish often arise from unsuitable keeping conditions. Maintaining a stable and comfortable habitat is a key factor for successful keeping. If symptoms of illness appear, the first step is to check the water quality. If deviations are found, it is important to take immediate measures to eliminate them. If the symptoms do not disappear or worsen, medicinal treatment may be required. More detailed information on symptoms and treatment methods can be found in the "Diseases of Aquarium Fish" section.

When choosing a Betta uberis, carefully inspect the fish for intact fins and the absence of white film, ulcers, or other damage on the body indicating bacterial infections. A healthy individual should be active, curious, and show no signs of emaciation or a bloated belly. Given the territorial nature of the species, it is important to ensure that the fish in the store are kept in suitable conditions, as overcrowding in retail aquariums often leads to stress and reduced immunity. It is recommended to purchase individuals that have already started accepting offered food, and to clarify their current keeping conditions in advance for a smooth adaptation to the new aquarium.