Fin's Fish Guide
The Sergeant major (Abudefduf saxatilis) is a saltwater fish of the family Pomacentridae that grows up to 23 cm.
Atlantic Ocean on both sides, near coral and rocky reefs, wrecks and harbour walls of shallow coastal waters.
Description
The sergeant major is a deep, oval reef fish of the family Pomacentridae (damselfishes) reaching about 23 cm. The silvery-yellow body bears five conspicuous black cross-bands, reminiscent of the stripes on a military uniform - hence the name. The species forms schools near coral and rock reefs, wrecks and harbour walls of shallow coastal water on both sides of the Atlantic. As an omnivore it eats algae, zooplankton, small invertebrates and growth. In the breeding season the male fiercely defends a territory, turns bluish and guards the purple eggs laid on a stone. For its abundance and striking markings it is one of the best-known reef fishes of the Atlantic coast.
Frequently asked questions
How do you recognise the Sergeant major?
The Sergeant major has a flattened, disc-shaped body, is mainly yellow-gold and shows a vertical stripes pattern. Deep-bodied, oval reef fish with five black vertical bars on a silvery-yellow ground, like the stripes of a sergeant major.
Where does the Sergeant major live?
The Sergeant major lives in the sea (marine waters) and is mostly found around stony or rocky ground. Atlantic Ocean on both sides, near coral and rocky reefs, wrecks and harbour walls of shallow coastal waters.
How big does the Sergeant major get?
The Sergeant major grows to a maximum of about 23 cm. On average the species is around 15 cm.
Is the Sergeant major dangerous to humans?
No, the Sergeant major is harmless to humans. None required: this species is harmless to humans.
Is the Sergeant major edible?
The Sergeant major is rarely eaten.
More photos
Easily confused with
These species look like the Sergeant major and live in the same waters.
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Abudefduf
More from the family Pomacentridae
Want the complete picture on the Sergeant major?
Point your camera at the fish and Fin names the species in seconds. Free, and the Sergeant major is one of 12,519 species in the app.