How to Identify Pygmy Corydoras

To identify Pygmy Corydoras (Corydoras pygmaeus), look at these key features.

Physical Characteristics

Body shape

torpedo

Coloration

The body is generally silvery-grey to light brown, with a prominent dark horizontal stripe running from the snout through the eye to the caudal peduncle. Above this stripe, there is often a lighter, sometimes iridescent, stripe. The belly is typically whitish. Fins are hyaline (transparent) to slightly dusky.

Scale type

none

Mouth position

inferior

Distinctive features

Smallest Corydoras species, typically reaching 2.5-3.0 cm (1.0-1.2 inches) in total length., Slender, elongated body compared to many other Corydoras species., Single dark lateral stripe., Two pairs of short, delicate barbels around the mouth., Adipose fin present.

Dorsal fin

Single dorsal fin, typically with I,7 (one spine, seven soft rays). The spine is relatively short and often serrated.

Tail fin

Forked caudal fin, symmetrical.

Pectoral fin

Pectoral fins with a strong, serrated spine and soft rays. The spine can be locked for defense.

Distinctive fins

Adipose fin is present, small, and located posterior to the dorsal fin.

Identification Tips

1. 1

   Size

   Its exceptionally small adult size (up to 3 cm) is a primary identifier among Corydoras species.

2. 2

   Lateral Stripe

   The distinct, unbroken dark horizontal stripe running along the flank is a key characteristic.

3. 3

   Body Shape

   Its more slender and torpedo-shaped body distinguishes it from the more robust, deeper-bodied Corydoras species.

4. 4

   Behavior

   Unlike many other Corydoras that stay strictly on the bottom, C. pygmaeus frequently swims in the mid-water column in tight schools.

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