Annamia normani

Adults of this fish typically reach a length of 8 to 10 cm. Sexual dimorphism is weakly expressed: females are generally slightly larger than males. The body of Annamia normani is elongated and noticeably flattened dorsally. Its fins are broad, resembling fans. The coloration is predominantly gray, adorned with an ornament of various irregular shapes.

The natural habitat of this species is in Southeast Asia. It can be found in the Mekong River basin, in the territories of Vietnam, Laos, and Cambodia. Annamia normani also inhabits streams and small rivers flowing down the slopes of the Annamite Range, which do not have direct communication with the Mekong. The typical biotope is a shallow stream with a fast current and exceptionally clear water. The riverbed often abounds with rapids and areas of calmer water, and the substrate consists predominantly of stones. Aquatic vegetation is usually concentrated along the banks.

Annamia normani is a calm and peaceful fish, capable of harmoniously coexisting with many species of tropical fish. However, due to its specific requirements for keeping conditions, the choice of suitable tank mates is significantly limited. It is recommended to keep these fish in groups of at least 6–8 individuals; with fewer, Annamia normani may become excessively timid and shy.

For a group of 6–8 Annamia normani, an aquarium of at least 100 liters will be required. It is extremely important to create conditions that are as close as possible to their natural habitat. This includes crystal clear, oxygen-rich water with active current, a stony substrate with smooth boulders, and the possibility of adding driftwood. Only a small number of aquatic plants thrive in such an environment, so preference should be given to unpretentious and hardy species such as Anubias, Bolbitis heudelotii, or Java fern; artificial alternatives are acceptable. An effective filtration system plays a key role. A powerful filter not only maintains high water quality and optimal dissolved oxygen levels but also creates the necessary internal current. If necessary, an additional system can be designed and installed to simulate water movement. Aquarium care includes regular removal of algae from the walls and organic waste from the substrate. Weekly water changes of 30–50% of the volume with fresh water and periodic equipment maintenance are also mandatory.

The fish's diet should be based on live or frozen foods, such as bloodworms, daphnia, and brine shrimp, with the obligatory inclusion of plant additives, for example, spirulina flakes. Dry foods – flakes, granules, tablets – are recommended for limited use, primarily to provide the fish with essential trace elements and vitamins.

To date, there are no documented cases of successful breeding of Annamia normani in home aquariums. Fry intended for the aquarium trade are typically caught directly from the wild.

Non-ornamental fish species that have retained a close resemblance to their wild relatives usually exhibit high endurance, strong immunity, and resistance to various diseases. The occurrence of health problems most often indicates unsuitable keeping conditions. Therefore, before proceeding with treatment, it is strongly recommended to check the water quality and parameters. Only after all indicators have been brought back to normal should treatment begin, if it is still necessary. Detailed information on diseases, their symptoms, and therapy methods can be found in the “Aquarium Fish Diseases” section.

When purchasing, special caution should be exercised, as fish often arrive for sale in a state of severe emaciation that is difficult to correct. Avoid individuals with sunken bellies, signs of lethargy, or a lack of interest in their surroundings. A healthy fish should actively move along the bottom and display natural exploratory activity for the species.

• inspect the body for damage, sores, or visible parasites;
• ensure that the fish do not appear excessively thin, which is a common problem for this species;
• check for signs of stress, such as constantly staying in the corners of the aquarium or attempting to hide when a person approaches.