How to Identify Teraglin

To identify Teraglin (Atrobucca nibe), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Generally silvery-grey to brownish on the dorsal surface, fading to silvery-white on the flanks and belly. Fins are typically dusky or yellowish. The most distinctive feature is the jet-black lining of the mouth and gill cavity.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Jet-black lining of the mouth and gill cavity (hence 'Blackmouth Croaker'), Large, oblique mouth extending to below the posterior margin of the eye, Two dorsal fins, deeply notched, Strongly ctenoid scales covering the body and head, A prominent lateral line that is slightly arched anteriorly and then straight to the caudal fin

Dorsal fin

Two dorsal fins, deeply notched; the first dorsal fin has 9-10 spines, and the second dorsal fin has 1 spine and 26-30 soft rays.

Tail fin

Truncate to slightly emarginate caudal fin.

Pectoral fin

Pectoral fins are moderately long, typically reaching to or beyond the tip of the pelvic fins.

Distinctive fins

Anal fin with 2 spines and 7-8 soft rays. Pelvic fins thoracic.

Identification Tips

1. 1

   Mouth and Gill Cavity Coloration

   The most definitive feature is the intense black pigmentation inside the mouth and gill covers. This is visible when the mouth is open or gills are flared.

2. 2

   Body Shape and Size

   Elongated, moderately compressed body, typically reaching up to 60 cm in length, though larger specimens up to 100 cm have been recorded.

3. 3

   Dorsal Fins

   Presence of two distinct dorsal fins, with the first being spiny and the second soft-rayed, separated by a deep notch.

4. 4

   Lateral Line

   Observe the lateral line, which is prominent and curves slightly upwards anteriorly before straightening towards the tail.

Explore Teraglin