Oreaster

{{Short description|Genus of starfishes}}

{{Automatic taxobox

| image = Starfish.JPG

| image_caption = O. reticulatus

| taxon = Oreaster

| authority = Müller & Troschel, 1842{{ cite web |url=http://www.marinespecies.org/asteroidea/aphia.php?p=taxdetails&id=149871 |author=C.L. Mah |title=Asteroidea taxon details for Oreaster Müller & Troschel, 1842 |year=2010 |work=World Asteroidea Database |accessdate=June 29, 2011}}

| subdivision_ranks = Species

| subdivision = See text

| synonyms = * Pentaceros J.E.Gray, 1840

| synonyms_ref =

}}

Oreaster is a genus of sea stars in the family Oreasteridae.