Fuzzy Dwarf Lionfish (Dendrochirus brachypterus)
The Dwarf Lionfish (Dendrochirus brachypterus), also known as the Fuzzy Dwarf Lionfish, is a compact yet strikingly beautiful species found throughout the Indo-Pacific. Highly sought after for its intricate patterns, flowing fins, and manageable size, this species is a popular choice among experienced marine reef keepers.
Key Information
• Small fish safe ❌ No (highly predatory, will consume smaller fish)
• Small invertebrate safe ❌ No (preys on crustaceans and small invertebrates)
• Coral safe ✅ Yes (does not feed on corals)
• Minimum tank size 114 litres (30 gallons)
• Adult size Up to 17 cm (6.5 inches)
• Diet Carnivorous, feeding on small fish and crustaceans
• Be aware of Venomous dorsal spines; slow-moving but efficient predator; may require live food when first introduced
Appearance and Colouration
The Dwarf Lionfish is well-known for its ornate and dramatic appearance:
• Body Colouration
Ranges from reddish-brown to deep red, with intricate mottling and darker vertical bands.
• Fins
Large, fan-like pectoral fins with elaborate markings and spots.
• Spines
Elongated, venomous dorsal spines used for defence.
• Size
Adults reach up to 17 cm (6.5 inches), making them one of the smallest lionfish species.
Natural Habitat and Behaviour
In the wild, the Dwarf Lionfish inhabits coral reefs, rubble zones, and rocky crevices at depths of 2 to 50 metres. It is a solitary, ambush predator, often lying motionless among rocks and corals before lunging at unsuspecting prey.
• Nocturnal Hunter
Prefers to hunt at dusk or night, using its camouflage to blend into reef structures.
• Slow but Efficient
Despite its slow movement, it is a highly effective predator, using its pectoral fins to corral prey before striking.
• Territorial
While not overly aggressive, it may establish a territory within the aquarium.
Tank Requirements and Water Parameters
• Minimum Tank Size 114 litres (30 gallons)
• Water Parameters
• Temperature 24°C – 26°C (75°F – 79°F)
• pH 8.1 – 8.4
• Specific Gravity 1.020 – 1.025
• Aquascaping
• Plenty of caves, ledges, and hiding spots to mimic their natural reef environment.
• Open swimming space to accommodate their hunting style.
• Lighting Moderate to low, as they prefer dimly lit environments.
• Water Movement Low to moderate, replicating their calm reef habitat.
Important Note: Ensure that all tank maintenance is done with caution, as their venomous spines can cause painful stings.
Diet and Feeding
Dwarf Lionfish are carnivores with a preference for live prey, although they can be trained to accept frozen and prepared foods.
• Preferred Diet
• Live mysis shrimp, ghost shrimp, and small marine fish.
• Frozen silversides, squid, and shrimp once accustomed to captivity.
• Vitamin-enriched frozen foods to maintain health and colouration.
• Feeding Frequency
3–4 times per week, ensuring they receive appropriately sized portions.
Training Tip: If reluctant to eat frozen foods, use feeding tongs to mimic live movement and encourage feeding.
Compatibility and Social Structure
• Temperament
• Generally peaceful with similar-sized or larger fish.
• Will prey on anything small enough to fit in its mouth.
• Tank Mates
• Suitable with large, non-aggressive species such as tangs, angelfish, and larger wrasses.
• Avoid housing with small fish, shrimp, or crabs, as they will be eaten.
• Keeping Multiple Lionfish?
• Can be kept with other Dwarf Lionfish in larger tanks, provided ample hiding spaces are available.
Important Considerations
• Venomous Spines
• The dorsal, anal, and pelvic spines contain venom that can cause severe pain, swelling, and nausea if stung.
• If stung, immediately immerse the affected area in hot water (as hot as tolerable) and seek medical attention if symptoms persist.
• Tank Security
• Ensure the aquarium has a tight-fitting lid, as lionfish can jump.
• Acclimation
• May require live food initially, with gradual introduction to frozen options.
Summary
The Dwarf Lionfish (Dendrochirus brachypterus) is an ideal lionfish species for those seeking an exotic predator in a moderately sized marine aquarium. While not aggressive toward tank mates, its venomous spines and predatory nature make it best suited for experienced reef keepers. With proper care, it will thrive as a fascinating centrepiece in a well-maintained aquarium.