How to Identify Neon Blue-Eye

To identify Neon Blue-Eye (Pseudomugil simulans), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Males display a vibrant iridescent blue to greenish-blue body, often with a yellow or orange tint on the ventral side. The fins are typically translucent with yellow or orange margins, and the first dorsal fin often has a black spot. Females are generally duller in coloration, with less extended fins. Both sexes possess prominent, large, iridescent blue eyes.

Scale type

cycloid

Mouth position

superior

Distinctive features

Large, iridescent blue eyes, Vibrant blue-green body coloration in males, Extended dorsal and anal fins in mature males, Small size, typically under 4 cm

Dorsal fin

Two dorsal fins; the first is small and spiny, the second is larger and soft-rayed. In males, the first dorsal fin often has a prominent black spot and the second dorsal fin is elongated.

Tail fin

Forked caudal fin, typically translucent with yellow or orange hues.

Pectoral fin

Small and clear, positioned high on the body.

Distinctive fins

Anal fin is elongated in males, mirroring the second dorsal fin. Pelvic fins are small and located ventrally.

Identification Tips

1. 1

   Eye Color

   The most striking feature is their large, brilliant iridescent blue eyes, which are a key identifier.

2. 2

   Body Coloration

   Look for the vibrant blue-green body, especially in males, which often have yellow or orange highlights on their fins and ventral side.

3. 3

   Fin Shape (Males)

   Mature males exhibit noticeably elongated and pointed dorsal and anal fins, often with distinct black markings on the first dorsal fin.

4. 4

   Size

   Their small size, typically under 4 cm, helps distinguish them from larger rainbowfish species.

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