Rasbora tornieri

Adults of this fish typically reach a length of 8–9 cm. Sexual dimorphism is not pronounced. Generally, females become somewhat larger than males, especially during the pre-spawning period. The coloration of Rasbora tornieri is rather subdued: the back is usually gray, the belly is silvery, and a double horizontal stripe—dark and golden—runs along the sides. Sometimes, their coloration may acquire delicate pinkish hues.

The natural range of Rasbora tornieri spans Southeast Asia: the species is known from Cambodia (Mekong drainage), Laos and Thailand, from Peninsular Malaysia, and from the islands of Sumatra and Borneo. Such a wide geographical distribution explains its ability to adapt to diverse aquatic conditions: from acidic, organic-rich swamps to fast, clear rivers, as well as temporary backwaters and flooded forest areas that form during the rainy season.

This peaceful schooling fish coexists well with other non-aggressive species of comparable size. Tankmates can be chosen from various regions; however, representatives from its native Southeast Asian habitat will look most harmonious in a community tank.

An aquarium of 100 liters or more is suitable for keeping a small school of Rasbora tornieri. The setup of their aquatic home depends entirely on the aquarist's preferences and can be quite varied: the fish will feel comfortable both in a virtually empty aquarium and among abundant aquatic vegetation. An important condition is the presence of a lid to prevent the fish from jumping out. Caring for this species will not be difficult even for beginners. Maintaining favorable water conditions is achieved through standard care procedures such as substrate cleaning and regular water changes, combined with a quality filtration system.

This species does not have particular demands regarding its diet. Rasbora tornieri readily accepts most popular types of food. To maintain a complete diet, it is recommended to include both dry foods, such as flakes and granules, and fresh or frozen foods, such as Artemia and bloodworms, in their daily menu. During the breeding season, it is especially important to provide the fish with protein-rich food.

When the breeding season arrives, the fish lay their eggs directly on the substrate. The incubation period lasts from 1 to 2 days, depending on the water temperature. The hatched fry begin to swim freely on the second day. Parental care is absent in this species, so adults may eat their eggs and fry. If there are not enough dense thickets or other hiding places in the main tank, the survival rate of the fry will be minimal. For successful breeding, offspring can be obtained by timely moving the eggs to a separate aquarium with similar water conditions, which will ensure their safety. Fry should be fed specialized microfoods or Artemia nauplii.

In a stable aquarium ecosystem, with suitable water conditions and regular care, fish health problems usually do not arise. Diseases can be a consequence of improper maintenance or injuries.

When purchasing, it is important to assess the overall condition of the school in the aquarium. Healthy fish should be active, have clean fins without signs of erosion or film, and smooth scales without spots or ulcers. Avoid individuals with sunken bellies or apathetic behavior, as this species is sensitive to water quality and transport conditions. — choose fish from the same batch to minimize stress during adaptation — carefully inspect the gills for any unnatural redness or mucus — ensure that there are no signs of dead individuals or recent additions in the aquarium with the fish, which increases the risk of infections.