also known as starry lionfish, is a species of venomous marine fish belonging to the family Scorpaenidae. They are native to the western Pacific Ocean and can be found in coral reefs, lagoons, and rocky areas.

Radial lionfish can grow up to 38 cm in length, with an average size of 25-30 cm. They have a typical scorpionfish-like shape, with a large head, elongated body, and pectoral fins that resemble wings. The pectoral fins are used for propulsion and for maneuvering through the water. The dorsal fins have 12 spines and 9-10 rays, and the anal fin has 3 spines and 5-6 rays. The body is covered in venomous spines, which can cause painful stings if touched.

The coloration and pattern of radial lionfish can vary depending on their habitat, but they typically have a reddish-brown or maroon body with white stripes or spots. The pectoral fins have a distinctive black and white striped pattern, resembling a zebra or a barcode. This pattern is thought to serve as a warning to potential predators, indicating that the fish is venomous and should not be attacked.

Radial lionfish are generally solitary and territorial, and will defend their space against other fish. They are carnivorous, feeding on a variety of small fish, crustaceans, and invertebrates. Their hunting strategy involves stalking their prey and then rapidly engulfing it with their large mouth.

In the aquarium trade, radial lionfish are popular due to their striking appearance and ease of care. However, they can be aggressive towards other fish and should be kept in a species-only tank or with other large, aggressive fish. They require a large tank with plenty of hiding places and strong filtration, as they are messy eaters and produce a lot of waste. They should be fed a varied diet of live and frozen foods, and care should be taken when handling them due to their venomous spines. Overall, radial lionfish are a fascinating and visually stunning addition to a large, well-maintained aquarium.