Nembrotha milleri

Seen in Malapascua, Philippines (2012). Photo by Mark Bockstael (my husband).
Nembrotha milleri is a species of sea slug, a dorid nudibranch, a marine gastropod mollusk in the family Polyceridae. This species was named after the nudibranch enthusiast Michael D. Miller. This animal can reach a total length of at least 60 mm. It has a grey-green to dark green body with blackish longitudinal wrinkles running down the length of the body. A different color form with pale yellowish green background has been observed around Taiwan. The rhinophores and gills are typically black.
Habitat: This species occurs in the tropical Indo-Pacific Ocean.