About Phestilla melanobrachia Bergh, 1874
Phestilla melanobrachia Bergh, 1874 is a species of sea slug, specifically an aeolid nudibranch. It is a marine gastropod mollusk that belongs to the family Trinchesiidae. Two distinct colour forms of this species are known: black and orange. Both colour forms feed on corals from the family Dendrophylliidae, and genetic testing has confirmed they are identical. This species was first described from specimens collected in the Philippines. It has been reported across a range that extends from Hong Kong and Japan, through Malaysia, eastward to Australia.
