How to Identify Devil Stinger

To identify Devil Stinger (Inimicus didactylus), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Highly variable, typically mottled brown, grey, red, or yellow, often with irregular blotches and spots that mimic its sandy or rocky surroundings. The pectoral fins often have bright, contrasting colors (e.g., yellow, orange, red) on their inner surfaces, displayed when threatened.

Scale type

none

Mouth position

superior

Distinctive features

Large, upward-pointing eyes located dorsally on the head., Numerous dermal flaps, tassels, and cirri covering the head and body, enhancing camouflage., A deeply depressed head and a broad, flattened body., Two free, finger-like rays at the base of each pectoral fin, used for 'walking' along the substrate and probing for prey., Potent venomous spines along the dorsal fin.

Dorsal fin

15-17 spines, 7-9 soft rays. The spines are stout and venomous, often partially embedded in a fleshy sheath.

Tail fin

Rounded to truncate, typically with 10-12 soft rays.

Pectoral fin

10-12 rays, with the two lowest rays being free and unbranched, acting as 'fingers'.

Distinctive fins

Pelvic fins are thoracic, with 1 spine and 5 soft rays. Anal fin has 2-3 spines and 9-11 soft rays.

Identification Tips

1. 1

   Body Shape and Camouflage

   Look for a flattened, irregular body covered in dermal flaps and cirri, allowing it to blend seamlessly with sand, rubble, or algae. Its coloration is highly variable to match its immediate surroundings.

2. 2

   Pectoral Fins

   The most distinctive feature is the two free, finger-like rays at the bottom of each pectoral fin, which it uses to 'walk' and probe the substrate. The inner surface of the pectoral fins often displays bright, contrasting colors (e.g., yellow, orange, red) when spread.

3. 3

   Eyes and Mouth

   Its large, upward-pointing eyes are located dorsally on the head, and its mouth is large and upturned, adapted for ambushing prey from below.

4. 4

   Dorsal Fin Spines

   Observe the prominent, stout dorsal fin spines, which are venomous. These are often partially hidden by fleshy tissue.

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