How to Identify West Indian Ocean Coelacanth

To identify West Indian Ocean Coelacanth (Latimeria chalumnae), look at these key features.

Physical Characteristics

Body shape

torpedo

Coloration

Dark blue to brownish-grey with irregular white or pale spots, which are unique to each individual and can be used for identification.

Scale type

ganoid

Mouth position

terminal

Distinctive features

Paired lobe fins (pectoral, pelvic, anal, and second dorsal) with internal skeletal elements, resembling limbs., Three-lobed caudal fin (tail fin) with a central fleshy lobe., Large, heavy ganoid scales., Unique intracranial joint (hinged skull) allowing for a wide gape., Persistent notochord instead of a fully ossified vertebral column., Rostral organ, a specialized electroreceptive sensory organ in the snout.

Dorsal fin

Two dorsal fins: a spiny first dorsal fin and a lobe-finned second dorsal fin.

Tail fin

Trilobate (three-lobed) caudal fin, with a small central lobe extending beyond the upper and lower lobes.

Pectoral fin

Paired, fleshy, lobe-like pectoral fins, used for propulsion and maneuvering.

Distinctive fins

All paired fins (pectoral, pelvic, anal, and second dorsal) are lobe-finned, meaning they are attached to the body by a fleshy stalk containing bone and muscle, allowing for greater articulation than ray fins.

Identification Tips

1. 1

   Overall Body Shape and Coloration

   Large, robust, torpedo-shaped body, typically dark blue to brownish-grey with distinctive white or pale spots. These spots are unique to each individual, like fingerprints.

2. 2

   Lobe Fins

   The most striking feature is the presence of fleshy, limb-like lobe fins (pectoral, pelvic, anal, and second dorsal). These fins are clearly stalked and move independently.

3. 3

   Caudal Fin

   A unique three-lobed tail fin, with a small, fleshy central lobe extending between the upper and lower lobes.

4. 4

   Scales

   Large, heavy, and rough ganoid scales, which are distinct from the cycloid or ctenoid scales of most teleost fish.

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