How to Identify Pearl Danio

To identify Pearl Danio (Danio albolineatus), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

The body is typically silvery-gold to iridescent blue, often with a distinct, shimmering, pearlescent stripe running horizontally along the lateral line from the operculum to the caudal peduncle. This stripe can be white, yellow, or orange, and may be bordered by darker pigmentation. Fins are generally translucent, sometimes with a yellowish or reddish tint, especially in males during breeding. Albino variants lack melanin, resulting in a white or pinkish body with red eyes.

Scale type

cycloid

Mouth position

superior

Distinctive features

Slender, torpedo-shaped body, Iridescent lateral stripe, Two pairs of small barbels (often difficult to see without close inspection)

Dorsal fin

Single, short-based dorsal fin located mid-body.

Tail fin

Forked caudal fin.

Pectoral fin

Paired pectoral fins, typically clear.

Distinctive fins

All fins are generally small and proportionate to the body, allowing for rapid movement.

Identification Tips

1. 1

   Body Shape and Size

   Look for a slender, elongated body, typically growing up to 4-6 cm (1.6-2.4 inches) in total length. Females are generally slightly larger and plumper than males, especially when gravid.

2. 2

   Coloration and Lateral Stripe

   Observe the iridescent, pearlescent stripe running along the lateral line. This stripe is the most distinguishing feature and can vary in color (white, yellow, orange) and intensity. The overall body color is silvery-gold to bluish.

3. 3

   Mouth Position

   The mouth is superior, indicating its feeding habit of surface-dwelling insects and zooplankton.

4. 4

   Barbels

   While small, two pairs of barbels are present at the corners of the mouth, though they can be difficult to discern without close examination.

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