Radiata Lionfish (Pterois radiata)

The Radiata Lionfish, also known as the Clearfin or Tailbar Lionfish, is a striking and unique species recognized by its bold, fan-like fins and red-brown body with white vertical stripes. Unlike other lionfish, the Radiata lacks the filaments between its spines, giving it a distinct and streamlined appearance. While beautiful, this lionfish requires caution due to its venomous dorsal spines, making it best suited for experienced aquarists with appropriate tank setups.

Care Information

• Maximum Size: Up to 9 inches.
• Tank Size: 70 gallons minimum; a spacious tank with plenty of rockwork for hiding and exploring is recommended.
• Diet: Carnivorous; primarily feeds on small fish and crustaceans in the wild. In captivity, it accepts a varied diet of meaty foods, such as mysis shrimp, krill, and chopped fish. Feeding with long feeding tongs is recommended to ensure safety and to mimic their natural hunting behavior.
• Water Temp: 72-78°F.
• Salinity: 1.020-1.025.
• Aggression: Semi-aggressive; the Radiata Lionfish is generally peaceful with other fish that are too large to be considered prey. It should be housed with non-aggressive tankmates of similar or larger size.
• Skill Level: Advanced; this species requires careful handling and an experienced aquarist familiar with venomous fish.
• Reef Compatibility: With caution; while it does not harm corals, the Radiata Lionfish will prey on small fish and invertebrates. It is best suited for fish-only setups or predator tanks.

Special Feature - Venomous Spines
The Radiata Lionfish has venomous dorsal spines that can cause painful stings if handled improperly. While generally not aggressive toward humans, handling should be avoided, and aquarists should use caution when performing tank maintenance.

Compatibility
The Radiata Lionfish is a semi-aggressive species that coexists well with other non-aggressive fish too large to be considered prey. Avoid housing it with small fish, shrimp, or other small invertebrates that could be seen as a food source. Its calm, deliberate movements make it a captivating addition to fish-only tanks.

Coloration

• Indo-Pacific Region: The Radiata Lionfish displays a reddish-brown body adorned with white vertical stripes, and its long, fan-like pectoral fins create an impressive display. Unlike other lionfish, the Radiata lacks the frilly filaments, giving it a unique, clean appearance​.

Typical Habitat

• Distribution: Found in the Indo-Pacific, particularly around coral reefs and rocky areas. The Radiata Lionfish prefers crevices and shaded areas, where it waits to ambush prey. It is often seen in shallow reefs and lagoons during the night when it actively hunts.