How to Identify Atlantic Bumper

To identify Atlantic Bumper (Chloroscombrus chrysurus), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Silvery-blue to greenish-blue dorsally, fading to silvery-white ventrally. A prominent black spot is present on the upper operculum and at the base of the pectoral fin. The caudal fin is distinctly yellow, especially in adults.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Deeply compressed, oval body, Small, terminal mouth, Two dorsal fins, the first with 8 spines, the second with 1 spine and 25-28 soft rays, Anal fin with 2 detached spines followed by 1 spine and 20-22 soft rays, Prominent black spot on the upper operculum and at the base of the pectoral fin, Yellow caudal fin, Lateral line with a short, arched anterior section and a straight posterior section, containing 20-28 scutes (bony plates) posteriorly

Dorsal fin

Two dorsal fins; first with 8 spines, second with 1 spine and 25-28 soft rays.

Tail fin

Deeply forked, distinctly yellow.

Pectoral fin

Long and falcate (sickle-shaped).

Distinctive fins

Anal fin with 2 detached spines followed by 1 spine and 20-22 soft rays.

Identification Tips

1. 1

   Body Shape

   Look for a very compressed, oval-shaped body, typical of jacks.

2. 2

   Coloration

   The silvery body with a distinct yellow caudal fin is a key identifier. Also note the black spot on the operculum and pectoral fin base.

3. 3

   Lateral Line

   Observe the posterior straight section of the lateral line which contains scutes, though they are not as prominent as in some other carangids.

4. 4

   Fin Count

   Counting fin rays and spines can confirm identification, especially the two detached anal fin spines.

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