Climbing Perch (8–12 cm) – a hardy, air-breathing freshwater fish known for its adaptability and unique ability to move on land. Perfect for species tanks or aquaponics.

The Climbing Perch (Anabas testudineus) is a fascinating freshwater species renowned for its adaptability, resilience, and ability to survive in low-oxygen environments. This species has a unique capability to breathe atmospheric air and even move short distances on land, making it one of the most remarkable fish in the aquarium hobby and aquaculture industry.

Measuring 8–12 cm, this hardy fish is ideal for aquarists looking for something unique or those engaged in aquaponics and aquaculture systems. Native to Asia, Climbing Perch thrives in various environments, from rivers and lakes to rice paddies and shallow pools.

✅ Key Features

• Size: 8–12 cm; can grow up to 25 cm in optimal conditions

• Temperament: Semi-aggressive; territorial with smaller or similar-sized fish

• Care Level: Easy to moderate

• Lifespan: 5–8 years under proper care

• Special Trait: Can breathe air and survive out of water for short periods

Care Guide for Climbing Perch

✅ Tank Requirements

• Minimum Tank Size: 150 liters (40 gallons) for one adult; larger tanks for multiple specimens

• Aquascape: Include hiding spots like driftwood, rocks, and hardy plants

• Lid Required: Absolutely essential – these fish can jump or climb out of the tank

• Filtration: Moderate to strong; ensure efficient oxygenation despite their air-breathing ability

✅ Water Parameters

• Temperature: 22°C – 30°C (72°F – 86°F)

• pH Level: 6.5 – 7.5

• Water Hardness: 6 – 20 dGH

• Maintenance: Perform 20–30% weekly water changes for healthy conditions

Climbing Perch are extremely hardy and can tolerate low oxygen, making them suitable for various setups, including outdoor ponds.

✅ Feeding Habits

Climbing Perch are opportunistic omnivores, preferring a protein-rich diet.

• Recommended Diet:

  • High-quality pellets for carnivores

  • Live or frozen foods (bloodworms, mealworms, small fish)

  • Insects and crustaceans

  • Occasional vegetable matter for balance

Feed once or twice daily, avoiding overfeeding as they have strong appetites.

✅ Tank Mates

Due to their semi-aggressive and predatory nature, Climbing Perch should be housed carefully.

Compatible Tank Mates:

• Larger, robust fish such as Snakeheads, Gouramis, and large Catfish

• Avoid small fish or delicate species, as they may be eaten

✅ Behavior & Breeding

• Behavior: Active, curious, and territorial; prefers the middle and top levels of the tank

• Breeding: Rare in home aquariums; requires specific environmental triggers

• Unique Ability: Can survive out of water for hours if moist, thanks to a specialized labyrinth organ

Why Choose Climbing Perch?

• Highly adaptable and hardy species

• Unique air-breathing ability and survival skill

• Great for advanced aquarists and specialty setups

• Excellent for aquaponics or outdoor pond systems

✅ Perfect for experienced aquarists seeking an unusual species
✅ A robust fish with fascinating behaviors and survival traits