Platynereis bicanaliculata is a species of marine polychaete worm in the family Nereididae.

[4][5] Platynereis bicanaliculata ranges widely in color from white, pink, yellow, orange, green, or brown, often appearing to have an iridescent sheen.

Its notopodia have simple, dark brown, two-lobed falcigers (setae) with hooked tips.

[7] Gut content investigations revealed that, like most nereids, Platynereis bicanaliculata is omnivorous and mostly feeds on algae and diatoms.

[8] Nereid polychaete worms like Platynereis bicanaliculata reproduce via epitoky, a process in which mature individuals transition from benthic to pelagic, swimming organisms by undergoing dramatic changes in body and behavior, to distribute their gametes into the free water column.