How to Identify Rosy Threadfin Bream

To identify Rosy Threadfin Bream (Nemipterus randalli), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Body silvery-pink to reddish dorsally, fading to silvery-white ventrally. A prominent reddish-yellow blotch or streak often present on the upper operculum (gill cover). Fins are generally pinkish or yellowish. The dorsal fin often has a yellow margin. The caudal fin is pinkish with a yellow upper lobe and a reddish tip on the elongated upper ray.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Elongated upper caudal fin ray in adults, which can be quite long., Reddish-yellow blotch on the upper operculum., Yellow margin on the dorsal fin., 10-11 transverse bars on the body, often faint or indistinct, especially in larger specimens.

Dorsal fin

Single dorsal fin with X spines and 9 soft rays. The first two dorsal spines are typically short.

Tail fin

Forked caudal fin, with the upper lobe significantly elongated into a filament in adults.

Pectoral fin

Pectoral fins are relatively long, reaching to or beyond the anus.

Distinctive fins

Pelvic fins are long, reaching to or beyond the anus, with a yellow tint.

Identification Tips

1. 1

   Caudal Fin

   Look for the elongated upper ray of the caudal fin, especially in adult specimens. This is a key distinguishing feature.

2. 2

   Opercular Spot

   Observe the reddish-yellow blotch on the upper part of the gill cover (operculum).

3. 3

   Dorsal Fin Margin

   Note the yellow margin along the dorsal fin.

4. 4

   Body Coloration

   The overall silvery-pink to reddish body color, fading to white ventrally, is characteristic.

5. 5

   Fin Length

   Pectoral and pelvic fins are relatively long, often reaching to or past the anus.

Explore Rosy Threadfin Bream