Amyema thalassia is a species of mistletoe in the family Loranthaceae native to Western Australia and the Northern Territory.
It was first described in 1962 by Bryan Alwyn Barlow.
The leaves are rounded and fleshy, with an obtuse base, a blunt apex and a winged petiole. The corolla is four-winged, and red at the base and green at the apex. There are four stamens.