How to Identify Weedy Scorpionfish

To identify Weedy Scorpionfish (Rhinopias agriloba), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Highly variable, ranging from mottled reds, purples, browns, and yellows to match the local substrate and algal growth. Often features irregular blotches and spots.

Scale type

none

Mouth position

superior

Distinctive features

Numerous, elaborate dermal flaps and cirri covering the head, body, and fins, resembling seaweed or detritus., Highly compressed body, giving it a leaf-like appearance., Large, upward-pointing eyes., Prominent, often elongated, supraorbital tentacles (eyebrow-like appendages).

Dorsal fin

Single, long dorsal fin with 12 spines and 8-9 soft rays. Spines are venomous.

Tail fin

Rounded caudal fin, often with dermal appendages.

Pectoral fin

Large, fan-like pectoral fins, often with elongated rays and dermal flaps, used for 'walking' on the substrate.

Distinctive fins

Pelvic fins are thoracic, with one spine and five soft rays. All fins are typically covered in dermal appendages.

Identification Tips

1. 1

   Dermal Appendages

   The most striking feature is the extensive network of leaf-like dermal flaps and cirri covering its entire body, head, and fins. These are highly variable in shape and density.

2. 2

   Body Shape

   Its highly compressed, almost flattened body, distinguishes it from other scorpionfish genera.

3. 3

   Coloration

   Observe the highly variable and cryptic coloration, which perfectly matches its immediate surroundings. This can range from vibrant reds and purples to dull browns and greens.

4. 4

   Supraorbital Tentacles

   Look for prominent, often elongated, tentacles above the eyes, which are also covered in dermal flaps.

5. 5

   Pectoral Fins

   Note the large, fan-like pectoral fins, which are often used to 'walk' along the substrate rather than swim.

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