Okenia lambat is a species of sea slug, specifically a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae.
This species was described from Luzon Island, Philippines.[1]
This Okenia has a broad body and eight pairs of long, pointed, lateral papillae. There is a single papilla on the back, in front of the gills. The body is opaque yellowish white and there is a broken brown band which runs from between the rhinophores to the tail, encircling the back and gills. This band is broken into a crazy paving pattern by thin white lines.
The diet of this species is not known.