A large nudibranch (about 2 inches) commonly known as a Blue Dorid nudibranch, although this is the common natural coloration (purplish). Photographed off Mainit Point near the dive resort community of Batangas, southern Luzon island, Philippines.

Identification: Hypselodoris bullocki (recently reclassified from genus Chromodoris to Hypselodoris)

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