Okenia nakamotoensis is a species of sea slug, specifically a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae.

[2] This Okenia has a narrow, almost cylindrical, body and long lateral papillae.

The body is bright pink and just the bases of the mantle processes are white.

In animals from the Philippines and the Marshall Islands the white pigment extends onto the body as a broken line joining the bases of the papillae and as spots and streaks.

This sea slug is very similar to Okenia kondoi and can be found with that species on the same food.