How to Identify Peacock Gudgeon

To identify Peacock Gudgeon (Tateurndina ocellicauda), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Males are more intensely colored, displaying iridescent blue-purple bodies with red-orange spots and stripes, particularly on the fins. Females are generally duller, with less intense coloration and a more rounded belly. Both sexes have a prominent black ocellus (eye-spot) ringed with yellow or orange at the base of the caudal fin, which gives them their scientific name 'ocellicauda' (ocellated tail).

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Prominent black ocellus at the caudal fin base., Iridescent blue-purple body with red-orange spots and stripes., Sexual dimorphism: males are more colorful and develop a nuchal hump., Two distinct dorsal fins.

Dorsal fin

Two dorsal fins; the first is spiny, the second is soft-rayed. Males often have elongated rays in the first dorsal fin.

Tail fin

Rounded to slightly spatulate caudal fin, featuring the characteristic ocellus.

Pectoral fin

Large, fan-like pectoral fins, often clear or with subtle coloration.

Distinctive fins

Pelvic fins are separate and not fused into a suction cup, distinguishing them from true gobies (Gobiidae).

Identification Tips

1. 1

   Caudal Fin Ocellus

   Look for the distinctive black spot ringed with yellow or orange at the base of the tail fin. This is a key identifying feature.

2. 2

   Coloration and Pattern

   Observe the iridescent blue-purple body with red-orange spots and stripes. Males are more vibrant.

3. 3

   Body Shape

   Note the elongated, somewhat torpedo-shaped body, typical of gudgeons.

4. 4

   Sexual Dimorphism

   Males are generally larger, more colorful, and develop a noticeable nuchal hump on their head when mature. Females are smaller and rounder, especially when gravid.

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