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Atlantic Sergeant Major

Abudefduf saxatilis

Atlantic Sergeant Major is a small, bold damselfish of warm Atlantic and Caribbean reefs, jetties, and piers. It often feeds in the water column above structure and is one of the most common bait-stealers around shallow tropical inshore reefs.

Saltwater
Atlantic Sergeant Major reference image
Pauline Walsh Jacobson, cc-by, via Wikimedia Commons. Source: Wikimedia Commons.

Identification points

  • Five dark vertical bars on a yellow to silvery body
  • Black spot at the base of the tail
  • Oval damselfish shape with a yellowish tail and dorsal fin

Habitat

Shallow coral and rocky reefs, seagrass edges, pilings, jetties, docks, and sheltered bays in warm tropical to subtropical coastal waters; commonly in very shallow, structure-heavy areas.

Bait notes

Small hooks with shrimp, squid strips, cut bait, bread, or tiny pieces of fish work best. Small shiny jigs, micro soft plastics, and very small flies also take fish readily when they are feeding near surface structure.

Behavior

Highly territorial around hard structure; swims in loose schools or small groups and nips plankton, algae, and small benthic invertebrates. It is quick to strike bait but often pecks without fully taking larger offerings.

Caution

No major consumption hazard is generally noted due to its small size, but local reef-fish advisories should be checked in ciguatera-prone areas. Sharp spines are not a major issue, but handle carefully around gill covers and fins.

Fishing notes

Fish light tackle and small hooks near docks, pilings, and reef edges; present baits quietly and let them drift naturally. Short casts and steady retrieves around visible schools are effective, but expect frequent pecking and bait theft.