Description
Paradox Fish – Armoured Stickleback – Alligator Fish – Indostomus paradoxus
Introduction
The Paradox Fish (Indostomus paradoxus) is a fascinating and delicate freshwater species prized for its unique appearance and behavior. Native to Southeast Asia, this micro-predator reaches a maximum size of just 1.5 inches (3.8 cm). With its armored body, intricate patterning, and shy demeanor, it is an excellent choice for aquarists seeking an unusual and peaceful addition to a nano aquarium or species-specific setup.
1. Natural Habitat and Behavior
Paradox Fish are found in slow-moving streams and ponds across Myanmar, where they inhabit densely vegetated areas. They are shy, bottom-dwelling micro-predators, often observed hovering near plants or hiding among leaves. Their behavior is calm and deliberate, making them best suited for quiet environments with minimal disturbance.
2. Aquarium Setup
- Tank Size: Minimum 10 gallons for a small group.
- Substrate: Fine sand or smooth gravel to replicate their natural environment.
- Decor: Heavily planted tanks with driftwood, rocks, and leaf litter for hiding spaces. Floating plants can help diffuse light.
- Water Conditions:
- Temperature: 72–79°F (22–26°C)
- pH: 6.0–7.0 (soft, slightly acidic water)
- Hardness: 2–10 dGH
- Filtration: Use a gentle filter to avoid strong currents; sponge filters are ideal.
- Lighting: Low to moderate lighting to reduce stress.
3. Diet and Feeding
Paradox Fish are micropredators with a preference for live or frozen foods. Offer:
- Live or frozen brine shrimp, daphnia, and bloodworms
- Microworms or grindal worms
- High-quality micro pellets or crushed flakes (as a supplement)
Feed small amounts 1–2 times daily to ensure all individuals get their share.
4. Compatibility with Other Tank Mates
- Compatible Species: Best kept in species-only tanks or with other small, peaceful fish like ember tetras or pygmy corydoras.
- Incompatible Species: Avoid larger, aggressive, or fast-moving fish, as they may outcompete the Paradox Fish for food or cause stress.
- Social Behavior: They thrive in small groups (5–6 individuals), as this reduces stress and encourages natural behavior.
5. Common Challenges and Tips
- Shy Nature: Provide ample cover to reduce stress and encourage them to come out of hiding.
- Feeding Competition: Monitor feeding to ensure all fish receive adequate nutrition, as they are slow and deliberate eaters.
- Water Quality: Paradox Fish are sensitive to changes in water parameters; perform regular water changes and monitor conditions closely.
- Tank Mates: Keep with similarly sized and calm species to maintain a harmonious environment.
Conclusion
The Paradox Fish (Indostomus paradoxus) is an exquisite nano fish that brings a sense of tranquility and uniqueness to any aquarium. While their care requires attention to detail, their intriguing behavior and delicate beauty make them a rewarding choice for experienced aquarists.
