Stegastes fasciolatus, commonly called the Pacific gregory, is a species of damselfish in the family Pomacentridae.

Stegastes fasciolatus is native to the western Indo-Pacific region.

[2] where it is found on shallow seaward reefs particularly in areas with mild to moderate water movement.

At Lord Howe Island and Easter Island it occurs from shallow surge pools down to depths of at least 30 m (98 ft).

[1] Stegastes fasciolatus is a territorial fish and may defend a small area for nesting or food.