The Indo-Pacific sergeant (Abudefduf vaigiensis) is a species of damselfish in the family Pomacentridae.

It may also be known as the Sergeant major although this name is usually reserved for the closely related species Abudefduf saxatilis.

[6] Indian Ocean populations are found in the Red Sea, the Gulf of Aden, Arabia, the Persian Gulf, the Arabian Sea, the Maldives, eastern Africa, Tanzania, Madagascar, Seychelles, Sri Lanka, the Andaman Sea, Indonesia, Malaysia, and Australia.

[6] Populations in the Pacific Ocean are found in the Gulf of Thailand, Malaysia, Indonesia, the Philippines, Taiwan, Japan, the Yellow Sea, the Great Barrier Reef around Australia, New Zealand, and Pacific islands all the way to Hawaii.

[6] Many people confuse this fish for Abudefduf saxatilis, a closely related species found in the Atlantic Ocean.

Depth ranges of 1 to 15 metres (3.3 to 49.2 ft) are where people encounter this fish.