How to Identify Yellowfin Leatherjacket

To identify Yellowfin Leatherjacket (Cantherhines pardalis), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Highly variable, typically mottled brown, tan, or yellowish with numerous small, dark spots or irregular markings. Can rapidly change color to match surroundings. Fins, especially the caudal fin, often have a yellowish tint.

Scale type

none

Mouth position

terminal

Distinctive features

Rough, sandpaper-like skin due to small, bristly scales, Small, protrusible mouth with strong teeth, First dorsal spine is stout and can be locked erect, Often has two prominent spines on the caudal peduncle in males

Dorsal fin

Two dorsal fins; the first with 2 spines (the first spine is large and erectile, the second is very small and locks the first), the second with 32-36 soft rays. The first dorsal spine is located above the eye.

Tail fin

Rounded to slightly truncate caudal fin, often with a yellowish hue.

Pectoral fin

Small, rounded pectoral fins with 13-14 rays.

Distinctive fins

Anal fin with 29-32 soft rays, similar in shape and size to the second dorsal fin. Pelvic fin reduced to a single spine, often with a small flap of skin.

Identification Tips

1. 1

   Body Shape and Skin

   Compressed, oval body with rough, sandpaper-like skin. The skin texture is a key characteristic of filefishes.

2. 2

   Coloration and Pattern

   Mottled brown, tan, or yellowish background with numerous small, dark spots or irregular markings. The ability to change color is notable. Look for yellowish tints on fins, especially the caudal fin.

3. 3

   Dorsal Spine

   The prominent, erectile first dorsal spine, which can be locked upright, is a defining feature of filefishes. It is located directly above the eye.

4. 4

   Caudal Peduncle Spines

   Adult males often possess two prominent, recurved spines on each side of the caudal peduncle (the narrow part of the body connecting to the tail fin).

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