Pomacentrus nigromarginatus

{{Short description|Species of fish}}

{{Speciesbox

| image = PomacentrusNigromarginatRLS.jpg

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Allen, G.R. |year=2022 |title=Pomacentrus nigromarginatus |volume=2022 |page=e.T188515A1886602 |doi=10.2305/IUCN.UK.2022-2.RLTS.T188515A1886602.en |access-date=1 April 2025}}

| taxon = Pomacentrus nigromarginatus

| authority = Allen, 1973

}}

Pomacentrus nigromarginatus, the blackmargined damsel, is a damselfish from the Western Pacific. It occasionally makes its way into the aquarium trade. It grows to a size of 8 cm in length.