How to Identify Walking Catfish

To identify Walking Catfish (Clarias batrachus), look at these key features.

Physical Characteristics

Body shape

eel-like

Coloration

Typically dark olive to brown or grey on the dorsal side, fading to a lighter, often mottled, ventral surface. Some individuals may exhibit faint vertical bands or spots. Albino and xanthic (yellowish) forms are also known, particularly in aquaculture.

Scale type

none

Mouth position

terminal

Distinctive features

Elongated, cylindrical body, tapering towards the tail., Broad, flattened head with a bony helmet-like structure., Four pairs of prominent barbels around the mouth (one nasal, one maxillary, two mandibular)., Long dorsal fin extending almost the entire length of the back, without spines., Long anal fin, also spineless, extending from behind the anus to the caudal fin., Small, rounded caudal fin, separate from dorsal and anal fins., Presence of an arborescent (tree-like) accessory breathing organ above the gill arches, allowing for aerial respiration., Strong, spiny pectoral fins used for 'walking' on land.

Dorsal fin

Very long, soft-rayed, extending from behind the head almost to the caudal fin. Typically 60-76 rays.

Tail fin

Small, rounded, and distinct from the dorsal and anal fins.

Pectoral fin

Well-developed, with a strong, serrated spine and soft rays. Used for locomotion on land.

Distinctive fins

Long, soft-rayed anal fin (47-60 rays) extending from behind the anus to the caudal fin. Pelvic fins are small and located abdominally.

Identification Tips

1. 1

   Body Shape

   Look for the elongated, eel-like body and broad, flattened head.

2. 2

   Barbels

   Identify the four pairs of prominent barbels around the mouth.

3. 3

   Dorsal and Anal Fins

   Note the very long, continuous dorsal and anal fins that run almost the entire length of the body.

4. 4

   Pectoral Spines

   Observe the strong, serrated spines on the pectoral fins, which are characteristic and can be used for defense and terrestrial locomotion.

5. 5

   Coloration

   Typically dark olive to brown, often mottled, with a lighter underside.

6. 6

   Absence of Adipose Fin

   Unlike many other catfish species, Clarias batrachus lacks an adipose fin.

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