How to Identify Black Barred Moenkhausia

To identify Black Barred Moenkhausia (Moenkhausia costae), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

The body is predominantly silvery, often with a subtle iridescent sheen. A prominent, vertically elongated black bar or spot is present on the caudal peduncle, extending onto the base of the caudal fin. Fins are generally hyaline (transparent), though the dorsal and anal fins may have a faint yellowish or reddish tint, especially in breeding males. Some individuals may exhibit a faint lateral line stripe.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Prominent black bar/spot on caudal peduncle, Silvery body coloration, Relatively deep body for a Moenkhausia species

Dorsal fin

Single dorsal fin, typically with 10-11 rays, positioned mid-body.

Tail fin

Forked caudal fin, with the black bar extending onto its base.

Pectoral fin

Paired pectoral fins, relatively small and hyaline.

Distinctive fins

Adipose fin present, typical of characins.

Identification Tips

1. 1

   Caudal Peduncle Mark

   The most definitive feature is the distinct, vertically oriented black bar or spot on the caudal peduncle, which often extends slightly onto the base of the caudal fin.

2. 2

   Body Shape

   Compared to some other Moenkhausia species, M. costae tends to have a slightly deeper body, though still compressed laterally.

3. 3

   Size

   Adults typically reach a maximum standard length of about 4-5 cm (1.6-2.0 inches).

Explore Black Barred Moenkhausia