How to Identify Red Lionfish

To identify Red Lionfish (Pterois volitans), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Alternating vertical bands of white, red, maroon, or brown across the head and body. The fins are often translucent with dark spots or bands.

Scale type

ctenoid

Mouth position

superior

Distinctive features

Extremely long, fan-like pectoral fins that are highly ornate and resemble feathers., Thirteen long, needle-like dorsal spines, three anal spines, and two pelvic spines, all venomous., Fleshy tentacles or cirri above the eyes and on the chin.

Dorsal fin

13 venomous spines followed by 10-11 soft rays. The spiny dorsal fin is prominent and fan-like.

Tail fin

Rounded caudal fin, often with dark spots.

Pectoral fin

14-17 rays, greatly elongated and separate, resembling a fan or wings.

Distinctive fins

Pelvic fins are also elongated and contain 1 spine and 5 soft rays. Anal fin has 3 venomous spines and 6-7 soft rays.

Identification Tips

1. 1

   Coloration and Pattern

   Look for the distinctive alternating vertical bands of white and reddish-brown/maroon across the body and head.

2. 2

   Fin Structure

   The most striking feature is the greatly elongated, fan-like pectoral fins and the prominent, spiny dorsal fin. These fins are often translucent with dark spots.

3. 3

   Spines

   Observe the numerous long, needle-like spines on the dorsal, anal, and pelvic fins. These are venomous and should not be touched.

4. 4

   Size

   Adults can reach up to 45 cm (18 inches) in length, though most commonly observed around 30-38 cm (12-15 inches).

Explore Red Lionfish