How to Identify Yellowfin Trevally

To identify Yellowfin Trevally (Carangoides bajad), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Adults typically have a silvery-bronze to brassy-yellow body, often darker dorsally and lighter ventrally. The most distinguishing feature is the bright yellow caudal fin, and often yellow pelvic and anal fins. Juveniles are silvery with 5-7 broad, dark vertical bands on the body, which fade with age.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Bright yellow caudal fin in adults, Often yellow pelvic and anal fins, A small, dark spot on the upper operculum, Lateral line with a moderately long anterior arch and a straight posterior section containing 20-30 scutes, Steeply sloped head profile

Dorsal fin

Two dorsal fins; the first with 8 spines, the second with 1 spine and 20-23 soft rays. The anterior rays of the second dorsal fin are elongated.

Tail fin

Deeply forked, bright yellow in adults.

Pectoral fin

Long and falcate (sickle-shaped), extending beyond the origin of the anal fin.

Distinctive fins

Anal fin with 2 detached spines followed by 1 spine and 17-19 soft rays. Pelvic fins are relatively short.

Identification Tips

1. 1

   Caudal Fin Color

   The most reliable adult identification feature is the bright yellow, deeply forked caudal fin.

2. 2

   Body Coloration

   Adults have a silvery-bronze to brassy-yellow body, often with a darker dorsal side.

3. 3

   Opercular Spot

   Look for a small, dark spot on the upper part of the gill cover (operculum).

4. 4

   Juvenile Markings

   Juveniles have distinct dark vertical bands on their silvery bodies, which fade as they mature.

5. 5

   Lateral Line

   Observe the lateral line; it has a distinct anterior arch and a straight posterior section with scutes.

Explore Yellowfin Trevally