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Marianina rosea
(Pruvot-Fol, 1930)
 
Marianina rosea
Maximum size:  about 10 mm.

Identification:  This is a distinctive species with a bright violet body, white bifid cerata and orange-tipped rhinophores.

Natural history:  Marianina rosea feeds on hydroids, unlike most tritoniids. We haven't seen it on Maui but it appears to be more common on Oahu and the Big Island where it occurs at moderately protected sites. A Big Island animal was found at 12 m (40 ft).

Distribution: Big Island and Oahu: widely distributed in the Indo-Pacific.

Taxonomic notes:  Some authors place this species in its own family, the Marianinidae. It was first recorded in Hawaii from Oahu by Gustav Paulay in Dec. 2008.

Photo:  Sara Thiebaud: found by Roney Rodrigues; Point Panic, Oahu; Dec. 19, 2021.

Observations and comments:

Note 1:  ( )
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