How to Identify Western Red Scorpionfish

To identify Western Red Scorpionfish (Scorpaena sumptuosa), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Highly variable, typically mottled reddish-brown, orange, or pinkish with darker blotches and bands, allowing for excellent camouflage against rocky and algal backgrounds. The fins often have darker spots or bands.

Scale type

ctenoid

Mouth position

superior

Distinctive features

Large head with numerous spines and ridges., Prominent supraorbital tentacles (dermal flaps above the eyes)., Numerous dermal flaps and cirri scattered over the head and body, enhancing camouflage., Large, upward-pointing mouth., Robust, venomous dorsal fin spines.

Dorsal fin

Single, long dorsal fin with 12 strong, venomous spines followed by 9-10 soft rays. The spiny and soft-rayed portions are deeply notched.

Tail fin

Rounded caudal fin.

Pectoral fin

Large, fan-like pectoral fins with 18-20 rays, often mottled or banded.

Distinctive fins

Pelvic fins are thoracic, located below the pectoral fins, with 1 spine and 5 soft rays. Anal fin has 3 venomous spines and 5 soft rays.

Identification Tips

1. 1

   Coloration and Camouflage

   Observe the mottled reddish-brown to pinkish coloration with darker blotches, which helps it blend seamlessly with rocky and algal substrates. The presence of numerous dermal flaps and cirri on the head and body is a key identifier.

2. 2

   Head Spines and Tentacles

   Note the large head with prominent spines and ridges, particularly the supraorbital tentacles (dermal flaps above the eyes). These are often branched or frilly.

3. 3

   Dorsal Fin

   Count the dorsal fin spines (12) and soft rays (9-10). The deep notch between the spiny and soft-rayed portions is characteristic. The spines are robust and venomous.

4. 4

   Pectoral Fins

   Examine the large, fan-like pectoral fins, which often display distinct mottling or banding patterns.

5. 5

   Geographic Location

   Confirm the specimen's origin within the known range of Western Australia, as this helps differentiate it from similar species found elsewhere.

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