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Fish
Jacks
Jacks · Carangidae
Jacks impress with their streamlined build and hunting shoals in clear coastal waters.
Fact file
- Size
- Depending on the species from 30 cm to over 1 m in length and weighing up to 18 kg
- Males and females
- Females and males are usually difficult to distinguish externally
- Sounds
- Rapid movements in the shoal create a rushing sound in the water
- Diet
- Small fish, crustaceans and squid
- Offspring
- Females lay up to several hundred thousand pelagic eggs in open water
How to identify Jacks
Jacks have a streamlined, muscular body with a laterally flattened silhouette. Their basic colour varies between silver, blue and green, and depending on the species their flanks may be marked with dark spots or stripes.
Striking features are the powerful, forked tail fin and a deeply indented tail base with sharp, small scales, the so-called keels. The pectoral fins are long and sickle-shaped, and the dorsal fin is often divided into two parts.
More in the app
With Wildful Stories+ you also get in the app:
- general viewing tips
- 2 places where you can see Jacks
Where Jacks live
Discover Jacks on your trip.
The app shows you where and when to see wildlife along your route.
