How to Identify Ruby Barb

To identify Ruby Barb (Pethia nigrofasciata), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Males in breeding condition display a striking ruby-red body with three prominent vertical black bands. The head often takes on a purplish hue. Fins are typically reddish, with the dorsal fin having a black blotch. Females are generally duller, exhibiting a yellowish-brown to silvery body with the same three black bands, and less intense red or orange coloration in their fins. Juveniles resemble females.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Three distinct vertical black bands on the body., Intense ruby-red coloration in breeding males., Black blotch on the dorsal fin.

Dorsal fin

Single, relatively tall dorsal fin with a black blotch, especially prominent in males.

Tail fin

Forked caudal fin, often reddish.

Pectoral fin

Paired pectoral fins, typically clear to reddish.

Distinctive fins

All fins are generally clear to reddish, with the dorsal fin's black blotch being a key identifier.

Identification Tips

1. 1

   Body Coloration

   Look for the characteristic three vertical black bands on the body. Breeding males will have a vibrant ruby-red body, while females and non-breeding males are more yellowish-brown to silvery.

2. 2

   Dorsal Fin

   Observe the dorsal fin for a distinct black blotch, which is present in both sexes but more pronounced in males.

3. 3

   Size

   Adults typically reach a maximum standard length of 5-6 cm (2-2.4 inches).

4. 4

   Behavior

   They are active schooling fish, often seen swimming in groups in the mid-water column.

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