How to Identify Indian Spiny Eel

To identify Indian Spiny Eel (Mastacembelus armatus), look at these key features.

Physical Characteristics

Body shape

eel-like

Coloration

The body is typically light brown to olive-green, adorned with a distinctive pattern of dark, irregular, interconnected blotches and stripes that resemble tire tracks or zig-zags. The ventral side is usually lighter. Fins are often mottled.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Elongated, snake-like body, Dorsal fin preceded by numerous small, isolated spines, Long, pointed snout with fleshy proboscis, Distinctive 'tire-track' or 'zig-zag' pattern on flanks, Small, embedded scales

Dorsal fin

Very long, continuous with the caudal fin, preceded by 30-40 isolated, sharp spines. The soft-rayed portion has 60-95 rays.

Tail fin

Rounded to slightly pointed, confluent with the dorsal and anal fins.

Pectoral fin

Small and rounded, typically with 20-25 rays.

Distinctive fins

Anal fin is also very long, continuous with the caudal fin, and has 3-5 spines followed by 60-90 soft rays. Pelvic fins are absent.

Identification Tips

1. 1

   Body Shape and Size

   Look for a highly elongated, snake-like body that can reach up to 90 cm (35 inches) in length, though typically smaller in aquariums.

2. 2

   Coloration and Pattern

   The most distinguishing feature is the irregular, dark, interconnected blotches and stripes on a lighter brown to olive background, resembling tire tracks or a zig-zag pattern along the flanks.

3. 3

   Dorsal Spines

   Observe the dorsal fin, which is preceded by a series of numerous (30-40) small, sharp, isolated spines along the back. These are distinct from the soft-rayed portion of the fin.

4. 4

   Snout

   Note the long, pointed snout with a fleshy proboscis, which is used for foraging in the substrate.

5. 5

   Fin Confluence

   The dorsal, caudal, and anal fins are typically confluent, forming a continuous fringe around the posterior part of the body.

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