How to Identify Dwarf Rasbora

To identify Dwarf Rasbora (Boraras maculatus), look at these key features.

Physical Characteristics

Body shape

torpedo

Coloration

The body is typically reddish-orange to deep red, with a prominent, irregularly shaped black spot on the mid-flank. Smaller black spots may be present on the caudal peduncle and near the anal fin. Fins are often translucent with reddish tints, and the dorsal and anal fins may have black markings.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Smallest species in the genus Boraras, rarely exceeding 2.5 cm (1 inch) in total length., Prominent, often irregularly shaped, black spot on the mid-flank., Males are generally more intensely colored and slender than females, especially during breeding., Females are typically rounder in the belly, particularly when gravid.

Dorsal fin

Single, relatively small, positioned mid-body.

Tail fin

Forked, with rounded lobes.

Pectoral fin

Small and transparent, positioned ventrally.

Distinctive fins

Anal fin is small, positioned posterior to the dorsal fin. Pelvic fins are small.

Identification Tips

1. 1

   Size

   Boraras maculatus is one of the smallest fish species, typically reaching a maximum size of 2.5 cm (1 inch). This distinguishes it from most other rasbora species.

2. 2

   Body Spot

   The most prominent identification feature is the large, often irregularly shaped, black spot located on the mid-flank. This spot can vary in intensity and shape but is consistently present.

3. 3

   Coloration

   The vibrant reddish-orange to deep red body coloration is a key characteristic, especially in healthy, well-conditioned specimens.

4. 4

   Habitat Preference

   Its preference for highly acidic, blackwater environments can also be a clue to its identity in the wild.

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