Demon Eartheater

Demon Eartheater

The Demon Eartheater (*Satanoperca jurupari*) is a captivating freshwater fish native to the Amazon River basin in South America. Renowned for its distinctive appearance and peaceful temperament, it has become a popular choice among aquarium enthusiasts.

Physical Characteristics:

• Size: Typically grows to about 25 cm (10 inches) in length.
• Coloration: Exhibits a greenish-yellow to yellow-brown body with each scale having an iridescent yellow to gold spot. On the head, these spots may develop a turquoise blue iridescence. The fins retain a similar pattern as the body. Sometimes faint, broad transverse stripes are present on the body.
• Shape: Features an elongated, laterally compressed body with a large, rounded head. Each ray of the dorsal fins comes to a sharp point, contributing to its distinctive silhouette.

Behavior:

• Temperament: Generally peaceful, making it suitable for community tanks. However, during the breeding season, it may exhibit territorial behaviour.
• Activity Level: Active swimmers that enjoy exploring their environment, often sifting through substrate in search of food.
• Community Behaviour: Compatible with other non-aggressive species. It's advisable to avoid housing with overly territorial or aggressive fish.

Aquarium Care:

• Tank Size: A minimum of 75 gallons (283 litres) is recommended to accommodate their size and activity level.
• Water Parameters:
  • Temperature: 24°C to 28°C (75°F to 82°F).
  • pH: Slightly acidic to neutral, ranging from 6.0 to 7.5.
  • Hardness: Soft to moderately hard water, with a general hardness (GH) of 3-10 dGH.
• Tank Setup:
  • Substrate and Decorations: A soft, sandy substrate is ideal. Incorporate live plants like Java fern, Anubias, and floating plants to provide cover and mimic their natural habitat.
  • Lighting: Moderate lighting is suitable, with floating plants helping to diffuse light and create shaded areas.
  • Filtration: A gentle filtration system is recommended, as strong currents can stress the fish. Regular water changes (about 20% weekly) are essential for maintaining a clean and healthy environment.

Diet:

Omnivorous by nature, the Demon Eartheater benefits from a varied diet:

• Pellets: High-quality sinking pellets designed for cichlids.
• Live or Frozen Foods: Offer brine shrimp, bloodworms, and daphnia to provide essential protein and variety.
• Vegetable Matter: Including blanched vegetables, such as spinach or zucchini, can help ensure a balanced diet.

Tankmates:

Suitable companions include:

• Larger Tetras: Such as Congo Tetra and Silver Dollar.
• Larger Rainbow: Like Red or Bosmani Rainbows.
• Bottom-Dwellers: Corydoras catfish or other peaceful bottom-dwellers.

Avoid housing with aggressive species or fin-nippers, as this can lead to stress or injury.

Breeding:

Breeding the Demon Eartheater can be rewarding:

• Breeding Setup: A separate breeding tank with shallow water (about 10-15 cm or 4-6 inches) is ideal. The water should be warm (around 26°C to 28°C or 79°F to 82°F) and slightly acidic (pH 6.0-6.5).
• Spawning Behaviour: The male will build a bubble nest and court the female. After spawning, the male will gather the eggs into the nest and guard them until they hatch.
• Fry Care: Once the fry are free-swimming, the male should be removed to prevent him from eating the fry. The fry can be fed with infusoria or newly hatched brine shrimp.

Special Considerations:

• Water Quality: Regular monitoring and maintenance of water quality are crucial for the health of the Demon Eartheater.
• Shy Nature: These fish can be shy, particularly in brightly lit tanks. Providing plenty of hiding spots can help them feel more secure.