How to Identify Dwarf Corydoras, Pygmy Corydoras, Tail Spot Corydoras

To identify Dwarf Corydoras, Pygmy Corydoras, Tail Spot Corydoras (Corydoras hastatus), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

The body is generally silvery-grey to olive-brown, with a distinctive, prominent black spot at the base of the caudal fin, often bordered by iridescent gold or silver patches. A faint dark lateral line may be present. The belly is typically lighter.

Scale type

none

Mouth position

inferior

Distinctive features

Small size, typically reaching 2.5-3.0 cm (1.0-1.2 inches) in total length., Prominent black spot at the caudal peduncle, often with iridescent highlights., Unique mid-water schooling behavior, unlike most other bottom-dwelling Corydoras., Two pairs of short barbels around the mouth.

Dorsal fin

Small, triangular, with a single spine and 7-8 soft rays. Often clear or slightly dusky.

Tail fin

Forked, with upper and lower lobes of similar size. The black spot is located at its base.

Pectoral fin

Small, fan-shaped, with a spine and soft rays. Used for propulsion and maneuvering.

Distinctive fins

All fins are generally hyaline (clear) or slightly dusky. The adipose fin is present and small.

Identification Tips

1. 1

   Size

   One of the smallest Corydoras species, rarely exceeding 3 cm (1.2 inches).

2. 2

   Caudal Spot

   The most defining feature is the distinct, round to oval black spot at the base of the caudal fin, often with iridescent borders.

3. 3

   Swimming Behavior

   Unlike most Corydoras, C. hastatus frequently swims in the mid-water column in tight schools, resembling small tetras, especially when feeling secure.

4. 4

   Body Shape

   More slender and torpedo-shaped compared to the more robust body of many other Corydoras species.

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