How to Identify Longspined Scorpionfish

To identify Longspined Scorpionfish (Scorpaena longispina), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Highly variable, typically mottled reddish-brown, grey, or greenish with irregular darker blotches and bands, allowing for excellent camouflage. Often has dark spots on the fins.

Scale type

ctenoid

Mouth position

superior

Distinctive features

Very large head with numerous spines and dermal flaps (cirri), Prominent supraorbital tentacles (cirri above the eyes), Deeply notched dorsal fin, Large pectoral fins, Venomous spines in dorsal, anal, and pelvic fins

Dorsal fin

Single dorsal fin with 12 strong, venomous spines followed by 9-10 soft rays. The spines are notably long, especially the anterior ones.

Tail fin

Rounded caudal fin, often with dark spots or bands.

Pectoral fin

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

Distinctive fins

Pelvic fins with 1 spine and 5 soft rays. Anal fin with 3 venomous spines and 5 soft rays.

Identification Tips

1. 1

   Supraorbital Tentacles

   Look for prominent, often branched, dermal appendages (cirri) above the eyes. These are a key distinguishing feature.

2. 2

   Dorsal Spines

   Count the dorsal spines (typically 12) and note their length, especially the anterior ones, which are notably long and robust.

3. 3

   Coloration and Pattern

   Observe the highly cryptic and variable coloration, which usually includes mottled patterns of reds, browns, and greys, often with darker blotches.

4. 4

   Head Spines and Dermal Flaps

   Examine the head for numerous spines and dermal flaps, which contribute to its camouflaged appearance.

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