
Appearance
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.

Distribution
This species occurs in the tropical Indo-Pacific Ocean. There is another nudibranch species known only as ''Nembrotha sp. 14'' in East Africa which may be a form of ''Nembrotha milleri''.
Habitat
''Nembrotha milleri'' feeds on ascidians and tunicates. It has been seen feeding on the green-ringed ascidian, ''Sigillina signifera''.References:
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