Fin's Fish Guide
The Double-lined mackerel (Grammatorcynus bilineatus) is a saltwater fish of the family Scombridae that grows up to 100 cm.
Description
The double-lined mackerel is a fast mackerel relative from the Indo-West Pacific. The species grows to about 100 cm and has a streamlined, blue-green to silvery body with a conspicuous double lateral line and a row of small finlets before the tail. As a pelagic predator it schools over reefs and in open coastal water and hunts small fish and crustaceans. It is a valued sport and food fish, but in large specimens there is a ciguatera risk. The IUCN assesses the species as Least Concern (LC).
Frequently asked questions
How do you recognise the Double-lined mackerel?
The Double-lined mackerel has a torpedo-shaped body, is mainly blue and shows a plain pattern. Double lateral line and caudal finlets; fast schooling mackerel relative with a ciguatera risk
Where does the Double-lined mackerel live?
The Double-lined mackerel lives in the sea (marine waters) and is mostly found around stony or rocky ground. Indo-West Pacific
How big does the Double-lined mackerel get?
The Double-lined mackerel grows to a maximum of about 100 cm. On average the species is around 50 cm.
Is the Double-lined mackerel dangerous to humans?
No, the Double-lined mackerel is harmless to humans. This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status.
Is the Double-lined mackerel edible?
The Double-lined mackerel is rarely eaten.
More photos
Want the complete picture on the Double-lined mackerel?
Point your camera at the fish and Fin names the species in seconds. Free, and the Double-lined mackerel is one of 12,519 species in the app.
All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Grammatorcynus
More from the family Scombridae
Want the complete picture on the Double-lined mackerel?
Point your camera at the fish and Fin names the species in seconds. Free, and the Double-lined mackerel is one of 12,519 species in the app.