Fin's Fish Guide
The Blackspot sergeant (Abudefduf sordidus) is a brackish-water fish of the family Pomacentridae that grows up to 24 cm.
Description
The blackspot sergeant is a large damselfish of the family Pomacentridae from the Indo-Pacific. The species grows to about 24 cm and has a silver-grey body with five to six dark crossbars and a conspicuous black spot on the tail base, to which the name refers. It inhabits rocky lagoons, reef-flat shorelines and piers in zones with mild surge; juveniles in tide pools. As an omnivore it grazes algae and eats small zooplankton and small invertebrates. In spawning the male fiercely guards the eggs laid on the rocks. The species is harmless to humans.
Frequently asked questions
How do you recognise the Blackspot sergeant?
The Blackspot sergeant has a flattened, disc-shaped body, is mainly silver-grey and shows a vertical stripes pattern. Dark vertical bars and a black caudal peduncle blotch; fiercely territorial coastal reef damselfish.
Where does the Blackspot sergeant live?
The Blackspot sergeant lives in brackish water and is mostly found around stony or rocky ground. Indo-Pacific; rocky lagoons, reef flats along the coast and piers.
How big does the Blackspot sergeant get?
The Blackspot sergeant grows to a maximum of about 24 cm.
Is the Blackspot sergeant dangerous to humans?
No, the Blackspot sergeant is harmless to humans. None required: this species is harmless to humans.
Is the Blackspot sergeant edible?
The Blackspot sergeant is rarely eaten.
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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 Blackspot sergeant?
Point your camera at the fish and Fin names the species in seconds. Free, and the Blackspot sergeant is one of 12,519 species in the app.