How to Identify Central Mudminnow

To identify Central Mudminnow (Umbra limi), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Generally olive-brown to dark brown on the back, fading to a lighter brown or yellowish-white on the belly. Sides often have 10-14 faint, narrow, dark vertical bars. A prominent dark bar or spot is present at the base of the caudal fin. A dark, horizontal stripe often runs from the snout through the eye to the operculum.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Small, cylindrical body, somewhat compressed laterally., Rounded caudal fin., Single dorsal fin located far back on the body, opposite the anal fin., Dark vertical bar at the base of the caudal fin., Ability to gulp air for respiration.

Dorsal fin

Single, short, and rounded, positioned posteriorly, typically with 13-16 rays.

Tail fin

Rounded, not forked.

Pectoral fin

Small and rounded, positioned low on the body.

Distinctive fins

Pelvic fins are small and located abdominally. Anal fin is short and rounded, similar in size and shape to the dorsal fin, and positioned directly below it.

Identification Tips

1. 1

   Body Shape and Size

   Small, cylindrical body, typically 5-10 cm (2-4 inches) in length, rarely exceeding 15 cm (6 inches).

2. 2

   Coloration and Markings

   Olive-brown to dark brown with faint vertical bars on the sides and a prominent dark bar at the base of the rounded caudal fin. A dark stripe through the eye is often visible.

3. 3

   Fin Placement

   Dorsal and anal fins are positioned far back on the body, almost directly opposite each other.

4. 4

   Caudal Fin

   Distinctly rounded, not forked.

5. 5

   Behavior

   Often observed gulping air at the surface, especially in poor water quality. They are generally secretive and hide among vegetation.

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