Clearfin Lionfish (Pterois radiata)
The Clearfin Lionfish, also known as the Radiata Lionfish or Radial Firefish, is a captivating marine species recognised for its distinctive appearance and venomous spines. Native to the Indo-Pacific region, this lionfish is a unique addition to marine aquariums but requires careful handling and specific care considerations.
Key Information
• Small fish safe: ❌ No (predatory towards smaller fish)
• Small invertebrate safe: ❌ No (may consume small crustaceans and shrimp)
• Coral safe: ✅ Yes (does not typically harm corals)
• Minimum tank size: 265 litres (70 gallons)
• Adult size: Up to 23 cm (9 inches)
• Diet: Carnivorous, feeding on meaty foods such as live shrimp and fish
• Be aware of: Venomous dorsal spines; handle with extreme caution to avoid envenomation
Appearance and Colouration
The Clearfin Lionfish boasts a striking appearance:
• Body: Adorned with vertical red, white, and black stripes.
• Fins: Large, fan-like pectoral fins and tall, quill-like dorsal fins that are clear or translucent, distinguishing it from other lionfish species.
Natural Habitat and Behaviour
In the wild, Pterois radiata inhabits coral-rich areas of the Indo-Pacific, often sheltering in crevices and under overhangs during the day and becoming more active at night. They are solitary predators, feeding on smaller fish and crustaceans.
Tank Requirements and Water Parameters
• Minimum Tank Size: 265 litres (70 gallons)
• Water Parameters:
• Temperature: 24°C – 28°C (75°F – 82°F)
• pH: 8.1 – 8.4
• Specific Gravity: 1.020 – 1.025
• Aquascaping: Provide ample hiding spots with caves and overhangs to mimic their natural habitat.
• Lighting: Moderate, accommodating their crepuscular nature.
• Water Movement: Moderate, replicating reef environments.
Diet and Feeding
As carnivores, Clearfin Lionfish require a diet rich in meaty foods:
• Primary Diet:
• Live or frozen shrimp
• Small fish
• Crustacean flesh
• Feeding Frequency: Feed 3-4 times per week, offering only what they can consume in a few minutes to prevent overfeeding.
Compatibility and Social Structure
• Temperament: Generally solitary and peaceful towards similarly sized tank mates but will prey on smaller fish and invertebrates.
• Tank Mates: Suitable companions include larger, non-aggressive species. Avoid housing with small fish or crustaceans that can be seen as prey.
Important Considerations
• Venomous Spines: The dorsal spines are venomous and can cause painful stings. Exercise extreme caution during tank maintenance and handling.
• Feeding Challenges: May require live food initially to entice feeding, especially when newly introduced to the aquarium.
• Reef Compatibility: While they do not harm corals, their predatory nature makes them unsuitable for tanks with small fish or ornamental crustaceans.
Summary
The Clearfin Lionfish (Pterois radiata) is a visually stunning species that can be a rewarding addition to a marine aquarium for experienced aquarists. Due to their venomous spines and specific dietary needs, they require careful handling and a well-planned tank environment. With appropriate care, they can thrive and become a captivating focal point in a suitably stocked marine setup.