Introduction to Giant Spotted Hatchetfish

The Giant Spotted Hatchetfish, scientifically known as Gasteropelecus maculatus, is a fascinating species renowned for its unique body shape and impressive jumping abilities. Native to the freshwater rivers and streams of South America, this species adds an intriguing dynamic to any aquarium. This guide aims to assist Australian aquarium enthusiasts in providing optimal care for these distinctive fish.

Optimal Water Conditions

Giant Spotted Hatchetfish thrive in warm, slightly acidic to neutral water, with temperatures ranging from 24°C to 28°C and a pH level of 6.0 to 7.5. Soft to moderately hard water is ideal, requiring regular monitoring and maintenance to ensure a healthy environment for these sensitive fish.

Aquarium Setup

A minimum tank size of 75 litres is recommended for a small group of Giant Spotted Hatchetfish, as they are active swimmers and need space to exhibit their natural behaviours. The tank should be well-covered, as hatchetfish are known to jump, especially if startled or during feeding. Provide plenty of floating plants and open swimming areas to mimic their natural habitat and encourage comfortable surface dwelling.

Diet and Feeding

Giant Spotted Hatchetfish are primarily insectivores and thrive on a diet rich in live foods. Offering a variety of foods such as live or frozen brine shrimp, daphnia, and insect larvae will keep them healthy and active. Supplementing with high-quality flake or pellet food designed for surface feeders can provide a balanced diet.

Social Behaviour and Compatibility

These hatchetfish are peaceful and best kept in schools of six or more to promote natural schooling behaviour and reduce stress. They are well-suited for community tanks with other peaceful, similarly sized fish. Avoid housing them with large or aggressive species that might stress or prey upon them.

Breeding Giant Spotted Hatchetfish

Breeding in captivity can be challenging but not impossible. A separate breeding tank with soft, acidic water and dense floating vegetation can encourage spawning. The eggs typically float to the surface and adhere to plants. After spawning, parents should be removed to prevent predation on the eggs and fry.

Conclusion

The Giant Spotted Hatchetfish is a captivating addition to the home aquarium, offering both beauty and unique behaviour. With proper care, the right environment, and a balanced diet, they will thrive, providing aquarists with a fascinating glimpse into the world of surface-dwelling fish.