Aphyosemion australe, also known as the Golden Wonder Killifish or Lyretail Killifish, is a small and colorful species of freshwater fish from the family Aplocheilidae. Native to the coastal regions of West Africa, these fish are popular among aquarium hobbyists for their vibrant colors, unique patterns, and interesting behavior.

Appearance:

• Size: Aphyosemion australe is a small fish, with males typically growing to about 2 to 2.5 inches (5 to 6.5 centimeters) in length, and females slightly smaller.
• Coloration: Males display brilliant colors with iridescent blues, greens, and reds, while females have more subdued coloration with silver and yellow hues. Both sexes have a distinctive black and white stripe running horizontally along their bodies.

Water Conditions:

• Temperature: Maintain a tropical water temperature between 72°F and 78°F (22°C to 26°C) for the comfort of Golden Wonder Killifish.
• pH Level: Aim for a slightly acidic to neutral pH level between 6.5 and 7.5, similar to their natural habitat.
• Water Hardness: Provide moderately soft to moderately hard water with a hardness level between 5 and 12 dGH.

Tank Setup:

• Tank Size: Aphyosemion australe can be kept in a small aquarium, but it is recommended to provide them with at least a 10-gallon (38 liters) tank to allow for swimming space and decorations.
• Aquascape: Use live plants, driftwood, and rocks to mimic their natural environment and create hiding spots.
• Filtration: Ensure proper filtration to maintain good water quality.

Feeding Habit:

• Omnivorous Diet: Golden Wonder Killifish are omnivores and will accept a variety of foods.
• High-Quality Flakes and Pellets: Offer high-quality flake or pellet food suitable for small tropical fish as their primary diet.
• Live and Frozen Foods: Supplement their diet with live or frozen foods such as brine shrimp, daphnia, and bloodworms.

Behavior:

• Peaceful Nature: Aphyosemion australe is generally peaceful and can be kept with other peaceful community fish species.
• Males can be territorial, so it's best to keep them with multiple females to disperse aggression.

Care:

• Water Quality: Regular water changes and proper filtration are essential to maintain excellent water quality for their well-being.
• Breeding: Golden Wonder Killifish are known for their unique breeding behavior, and they are egg-layers. Breeding can be achieved by providing a suitable spawning medium and appropriate water conditions.