How to Identify Highfin Corb

To identify Highfin Corb (Platichthys altipinnis), look at these key features.

Physical Characteristics

Body shape

flat

Coloration

Dorsal (eyed) side is typically mottled brown, grey, or olive, often with darker spots or blotches, providing excellent camouflage. The ventral (blind) side is white or cream-colored. Coloration can vary to match the substrate.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Highly compressed, oval-shaped body., Eyes are typically on the right side of the head (dextral)., Very high and long dorsal and anal fins, giving it the 'highfin' name., Lateral line is prominent and slightly arched above the pectoral fin.

Dorsal fin

Extremely long, originating just behind the eye and extending almost to the caudal fin, with 65-80 soft rays. The anterior rays are notably elevated.

Tail fin

Rounded to slightly truncate, distinct from the dorsal and anal fins.

Pectoral fin

Small and rounded, located on both eyed and blind sides.

Distinctive fins

Anal fin is also very long, mirroring the dorsal fin in shape and length, with 48-60 soft rays. Pelvic fins are small and thoracic.

Identification Tips

1. 1

   Fin Height

   The most distinguishing feature is the exceptionally high anterior portion of both the dorsal and anal fins, which are noticeably taller than in most other flatfish species.

2. 2

   Eye Position

   Typically dextral, meaning both eyes are on the right side of the head. This can help differentiate it from sinistral (left-eyed) flatfish.

3. 3

   Body Shape

   Its oval, highly compressed body is characteristic of the Pleuronectidae family, but the overall profile with the high fins is unique.

4. 4

   Lateral Line

   Observe the lateral line, which has a distinct arch above the pectoral fin.

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