The blue poison dart frog or blue poison arrow frog (Dendrobates tinctorius "azureus") is a poison dart frog found in the forests surrounded by the Sipaliwini Savanna, which is located in southern Suriname (known in Surinamese Dutch as blauwe pijlgifkikker) and adjacent far northern Brazil. D. tinctorius azureus is also known by its indigenous Tirio name, okopipi. Its scientific name comes from its azure (blue) color. While frequently considered a valid species in the past, recent authorities treat it as a variant of D. tinctorius.
