How to Identify Combtail

To identify Combtail (Belontia signata), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Body coloration varies, typically ranging from dull brown to reddish-brown or olive-green, often with iridescent scales. Males tend to be more colorful, especially during breeding, displaying reddish hues and more pronounced fin coloration. Fins can have reddish or bluish tints, sometimes with dark spots or bands. The operculum often shows iridescent blue or green.

Scale type

ctenoid

Mouth position

superior

Distinctive features

Elongated, comb-like rays in the caudal fin, particularly in males., Relatively large eyes., Robust body structure., Prominent lateral line.

Dorsal fin

Long and low, extending almost to the caudal fin, with 15-18 spines and 8-10 soft rays. The posterior soft-rayed portion is often pointed.

Tail fin

Rounded to slightly emarginate, with the outer rays often extended and comb-like, especially in mature males, giving rise to the common name 'Combtail'.

Pectoral fin

Rounded and relatively small, typically with 12-14 rays.

Distinctive fins

Pelvic fins are filamentous, with the first ray elongated.

Identification Tips

1. 1

   Caudal Fin

   Look for the distinctive comb-like extensions on the caudal fin, especially in males. This is the most prominent identifying feature.

2. 2

   Body Shape and Size

   A relatively robust, laterally compressed body, reaching up to 18 cm (7 inches) in total length, though typically smaller in aquaria (around 12-15 cm).

3. 3

   Coloration

   Observe the overall dull brown to reddish-brown coloration with potential iridescent scales and reddish/bluish tints on fins. Males are generally more vibrant.

4. 4

   Habitat

   If observed in the wild, its presence in slow-moving, vegetated freshwater bodies in Sri Lanka is a strong indicator.

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