How to Identify Celebes Rainbowfish

To identify Celebes Rainbowfish (Marosatherina ladigesi), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Males exhibit a silvery-blue to iridescent body with yellow to orange fins, particularly the dorsal and anal fins, which are often edged in black. Two prominent black stripes run horizontally along the flanks, one from the snout through the eye to the caudal peduncle, and another fainter one below it. Females are generally less colorful, with more subdued yellow fins and less pronounced black stripes.

Scale type

cycloid

Mouth position

superior

Distinctive features

Two prominent black horizontal stripes along the body., Elongated, sail-like dorsal and anal fins in mature males., Iridescent blue-silver body coloration., Forked caudal fin.

Dorsal fin

Two dorsal fins; the first is small and spiny, the second is much larger, soft-rayed, and sail-like in mature males, often with yellow to orange coloration and a black margin.

Tail fin

Deeply forked caudal fin, often with yellow or orange hues.

Pectoral fin

Small and transparent.

Distinctive fins

The elongated, high dorsal and anal fins of mature males are a key distinguishing feature, giving them a 'sailfin' appearance.

Identification Tips

1. 1

   Body Shape and Size

   Slender, elongated body, typically reaching 4-6 cm (1.6-2.4 inches) in total length. Males are slightly larger and more robust than females.

2. 2

   Coloration

   Silvery-blue body with two distinct black horizontal stripes. Males have vibrant yellow to orange dorsal, anal, and caudal fins, often with black margins. Females are duller.

3. 3

   Fin Morphology

   Males possess greatly elongated, sail-like dorsal and anal fins, which are a key identifier. The caudal fin is deeply forked.

4. 4

   Mouth Position

   Superior mouth, indicating a surface feeder.

Explore Celebes Rainbowfish