Description
Pterois radiata, commonly known as the Radiata Lionfish, is a striking and less commonly encountered lionfish species distinguished by its bold striping and elegant fin structure. This species features a dark reddish-brown body contrasted by crisp white vertical bands, along with long, flowing pectoral fins and a distinctive pair of white “antennae” above the eyes. Its refined patterning and slightly more slender profile set it apart from more common lionfish species.
Native to the Indo-Pacific, the Radiata Lionfish inhabits reef slopes and lagoons, where it moves deliberately and hunts using stealth, often cornering prey with its extended fins.
Lighting: Low to moderate; prefers subdued lighting but adapts to standard marine conditions
Flow: Low to moderate; gentle flow supports natural hovering behavior
Placement: Mid to lower areas with rockwork for shelter and ambush positioning
Temperature: 75–80°F (24–27°C)
Salinity: 1.0265 SG (35 PPT)
pH: 8.1–8.4
Alkalinity: 8–10 dKH
Diet: Carnivorous; feeds on shrimp, small fish, and other meaty foods—training to frozen is recommended
Aggression: Predatory; will consume any tank mate small enough to fit in its mouth
Adult Size: Up to 25 cm
Care Level: Intermediate – hardy but requires appropriate feeding and tank mate selection
Compatibility: Not reef-safe; best suited for predator systems with larger, non-competitive tank mates
