How to Identify Asian Stinging Catfish

To identify Asian Stinging Catfish (Heteropneustes fossilis), look at these key features.

Physical Characteristics

Body shape

eel-like

Coloration

Typically dark brown to black on the dorsal side, fading to a lighter brown or grey on the ventral side. Some individuals may exhibit a reddish or purplish tinge. Juveniles can be lighter.

Scale type

none

Mouth position

terminal

Distinctive features

Elongated, compressed body, almost eel-like., Four pairs of long, sensitive barbels around the mouth (one nasal, one maxillary, two mandibular)., Presence of a potent venom gland associated with the pectoral fin spines., Accessory respiratory organs (air sacs) extending backward from the gill chamber, allowing for aerial respiration., Small, embedded eyes.

Dorsal fin

Short, spineless, located anteriorly on the body.

Tail fin

Rounded or slightly emarginate, confluent with the anal fin in some descriptions, but typically distinct.

Pectoral fin

Strong, with a serrated, venomous spine and several soft rays.

Distinctive fins

Anal fin is very long, extending from behind the dorsal fin almost to the caudal fin. Pelvic fins are small and located abdominally.

Identification Tips

1. 1

   Body Shape

   Look for its distinctly elongated, almost snake-like or eel-like body, which is compressed laterally.

2. 2

   Barbels

   Observe the four pairs of prominent, long barbels around its mouth, which are crucial for foraging in murky waters.

3. 3

   Pectoral Spines

   Note the presence of strong, serrated spines at the leading edge of the pectoral fins. These are venomous and a key identifying feature, but should not be touched.

4. 4

   Dorsal and Anal Fins

   The dorsal fin is short and located anteriorly, while the anal fin is remarkably long, extending along much of the posterior ventral side of the body.

5. 5

   Coloration

   Its generally dark brown to black coloration on the back, fading to lighter shades on the belly, is characteristic.

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