Wanam rainbowfish
Introduction
The Wanam rainbowfish (Glossolepis wanamensis), also known as the Lake Wanam rainbowfish, is a captivating species cherished by aquarists for its vibrant coloration and active demeanor. Endemic to Lake Wanam in Papua New Guinea, this fish exhibits a striking iridescent green body with hints of blue and yellow, making it a standout addition to freshwater aquariums. While they are relatively hardy, providing optimal care is essential to maintain their health and showcase their brilliant hues.
Care and Environment
Proper care for the Wanam rainbowfish involves attention to tank size, water parameters, and overall environment to ensure their well-being.
What is the minimum tank size for a Wanam rainbowfish?
A minimum tank size of 85 liters (approximately 22 gallons) is recommended for a single Wanam rainbowfish. However, as they are active swimmers and prefer to be in groups, a larger tank is advisable.
What are the ideal water parameters for Wanam rainbowfish?
Maintaining water temperatures between 25-30°C (77-86°F), a pH range of 7.0-8.0, and water hardness between 10-20 dGH is ideal for Wanam rainbowfish. They thrive in slightly alkaline and moderately hard water conditions.
How should the tank be set up for Wanam rainbowfish?
A well-planted aquarium with areas of dense vegetation and open swimming spaces is ideal. Incorporating floating plants can provide shaded areas, mimicking their natural habitat. A gentle water flow is preferred, and the tank should be securely covered, as these fish are known to jump.
Filtration should be efficient to maintain high water quality, with regular partial water changes to keep the environment clean. Lighting can be moderate; however, providing shaded areas with plants can help replicate their natural conditions.
As omnivores, Wanam rainbowfish accept a variety of foods, including high-quality flake foods, small pellets, and live or frozen foods like brine shrimp and bloodworms. A varied diet enhances their coloration and overall health.
Origin and Habitat
The Wanam rainbowfish is native to Lake Wanam, a small, shallow crater lake situated on a plateau approximately 24 kilometers west of Lae in Papua New Guinea. The lake, with a maximum depth of about 20 meters, is surrounded by hills and features extensive patches of water lilies and other aquatic vegetation along its edges. These fish are typically found in the clear, shallow waters among the vegetation, where they thrive in the lake's unique ecosystem.
Temperament and Compatibility
Wanam rainbowfish are peaceful and active, making them suitable for community aquariums with similarly sized, non-aggressive tank mates.
Do Wanam rainbowfish need to be kept in groups?
Yes, they are shoaling fish and should be kept in groups of at least 6-8 individuals. Keeping them in groups encourages natural behaviors and vibrant coloration.
What are suitable tank mates for Wanam rainbowfish?
Compatible tank mates include other rainbowfish species, larger tetras, danios, barbs, and catfish such as Corydoras. It's important to avoid housing them with smaller or slow-moving fish, as the active nature of Wanam rainbowfish may cause stress to more timid species.
Are Wanam rainbowfish aggressive?
They are generally peaceful but can be skittish. Providing ample space and maintaining them in appropriate group sizes helps minimize stress and potential aggression.
Interesting Facts
The Wanam rainbowfish is critically endangered in the wild, primarily due to competition from introduced tilapia species in Lake Wanam. Conservation efforts are crucial to preserve this unique species.
In the aquarium trade, they are prized for their dynamic color changes, which can vary based on mood, lighting, and environmental conditions. Males are particularly vibrant, especially during breeding displays.
Breeding Wanam rainbowfish in captivity is achievable with proper care. They are egg scatterers, and providing spawning mops or dense vegetation can encourage breeding. However, adults may consume their eggs, so it's advisable to remove the eggs to a separate tank for hatching.
Sources
All information in this article has been gathered from the following reputable sources:
Overview
Recommended Tank Size 39.6 Gallon (for groups of 6 or more) |
Minimum Group Size 6 |
Minimum Tank Volume 22.5 Gallon |
Maximum Adult Length 3.9 inch |
Average Adult Length 3.5 inch |
Shoaling (6+ required) Yes |
Preferred Water Type Freshwater, slightly alkaline |
Temperature Range (°C) 25-30 |
pH Range 7.0-8.0 |
Water Hardness (dGH) 10-20 |
Typical Lifespan (years) 5 years |