Hypselodoris cf. maritima (Baba, 1949) [Glossodoris]

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cf. is an abbreviation from a Latin word (confer) and means 'refer to' or 'compare with', here it means it could possibly be Hypselodoris maritima or perhaps something closely related, or at least similar in appearance.
Hypselodoris cf. maritima is characterized by a blue submarginal border and a yellow band inside the blue border. The mantle is white with black spots, the gills are white with orange edgings, and the rhinophores are translucent white at the base and orange at the top. It differs from Hypselodoris maritima by having black spots on the white mantle instead of longitudinal black lines.
Bill Rudman has this one as Hypselodoris sp. 7 at his website. Nerida Wilson suggests in a message: "Hypselodoris sp. seems to have some similarities to H. maritima. Perhaps the solid lines in typical H. maritima have broken down to form spots?"
More informations on Hypselodoris sp. 7 are at Bill Rudman's Sea-Slug Forum!