Radiata Lionfish

The Radiata Lionfish (Pterois radiata) is one of the smaller and less common lionfish species in the aquarium trade, distinguished by its elegant, translucent fins and distinctive markings. Also known as the Clearfin Lionfish or Tailbar Lionfish, this species is noted for being the only *Pterois* species lacking spots or bands on its dorsal spines and pectoral fins, which are clear (hence the name). They also feature two distinct horizontal white stripes on the base of the tail (caudal peduncle).

Native to the Indo-Pacific and Red Sea, the Radiata Lionfish is a nocturnal and more secretive predator than its larger cousins. It is capable of reaching an adult size of 8 to 10 inches (20-25 cm). Due to their size and predatory nature, a minimum aquarium size of 70 to 75 gallons is recommended, with plenty of live rock to create the caves and overhangs they prefer for daytime hiding.

Like all members of the genus, the Radiata Lionfish is equipped with venomous spines. They are a hardy fish once established but require care in handling and diet.

Diet & Compatibility:

• Diet: This fish is a dedicated Carnivore that hunts small fish and crustaceans at night. In captivity, it must be trained to accept a varied diet of frozen meaty foods, such as silversides, krill, and pieces of squid. It often requires live food, like feeder shrimp, initially to encourage feeding. Feed a large meal only 2–3 times per week to maintain a healthy weight.
• Feeding: Due to their shy and nocturnal nature, they may take longer than other lionfish to adapt to hand-feeding or frozen foods. Persistence is key, often requiring the use of feeding sticks or tongs near their hiding spot.
• Reef Compatibility: It is Reef Safe With Caution. The Clearfin Lionfish will prey upon nearly all ornamental shrimp, crabs, and very small fish. It will generally leave corals and sessile invertebrates alone.
• Temperament: It is Semi-Aggressive / Predatory. They are generally peaceful toward larger fish that cannot be swallowed. They are best kept with other semi-aggressive fish that are too large to be considered prey, such as certain triggers, larger angels, and tangs. They are typically solitary.
• Venomous Spines: The sting is extremely painful. If stung, immediately immerse the affected area in the hottest water you can tolerate (not scalding) for 30-90 minutes, and seek medical attention immediately.

Quick Facts

• Scientific Name: Pterois radiata
• Primary Common Name: Radiata Lionfish
• Other Common Names: Clearfin Lionfish, Tailbar Lionfish, Radial Firefish
• Origin: Indo-Pacific, Red Sea
• Max Size: 8-10 inches (20-25 cm)
• Temperament: Semi-Aggressive / Predatory (Venomous)
• Diet: Carnivore (Frozen meaty foods)
• Minimum Tank Size: 70-75 Gallons
• Reef Compatibility: With Caution (Eats shrimp and small fish)