Glossolepis Wanamensis

Datasheet

General Description

The Lake Wanam Rainbowfish, scientifically known as Glossolepis Wanamensis, is a species endemic to Lake Wanam in Papua New Guinea. It belongs to the Melanotaeniidae family and can grow up to 10.0cm in length. Due to environmental threats, including the introduction of non-native species and human activities, this rainbowfish is considered critically endangered. The species has become a subject of conservation efforts, including captive breeding programs.

Aquarium Setup

The Lake Wanam Rainbowfish requires an aquarium with a minimum size of 85 litres. Tank setup should include areas of dense vegetation and open spaces for swimming. It thrives in planted tanks with gentle water movement and high water quality. Water parameters should be maintained within a pH range of 7.0-8.0, a temperature of 25-30°C, and a water hardness of 10-20°dH. Weekly partial water changes are advised for optimal health.

Behaviour

This rainbowfish species is known for its peaceful demeanor but can be disruptive to smaller or slower fish due to its rapid movements and relatively large size. Keeping them in shoals of at least 6-8 individuals is recommended, as they feel more secure and display their best colors in the company of conspecifics. Suitable tankmates include similarly-sized rainbowfish, characins, danios, barbs, and hard water-tolerant catfish such as Corydoras.

Feeding and Diet

The Lake Wanam Rainbowfish is unfussy when it comes to diet and readily accepts a variety of dried, frozen, and live foods. Regular feedings of live foods enhance its coloration. Offering a diverse diet ensures the nutritional well-being of this species.

Reproduction & Dimorphism

Reproduction in Glossolepis Wanamensis follows an egg-scattering pattern. Breeding tanks should contain slightly hard, alkaline water with a pH of around 7.5 and a temperature of 75-80°F. Males exhibit brighter coloration, deeper bodies, and elongated first dorsal and anal fins compared to females. Successful spawning and raising of fry require attention to water conditions and proper feeding regimes.

Habitat and Distribution

Endemic to the shallow and small Lake Wanam surrounded by hills in Papua New Guinea, the Lake Wanam Rainbowfish is often found near water lilies and other vegetation in clear, shallow water. Human activities and the introduction of non-native species have threatened its survival, leading to conservation efforts to protect this species in its native habitat.