Selection: Platydoris formosa

Platydoris formosa (Alder & Hancock, 1866) [Doris]

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Platydoris formosa has fine brown specks and large red patches. It is characterized by bright red rhinophore clubs and by distinct black lines outlining the gills. It grows up to 15 cm length.
Pretty similar are:
Platydoris cinerobranchiata which differs by uniformly bluish-grey gills and by brownish-green rhinophores and
Platydoris cruenta which differs by its hair-like brown lines on the mantle.
More informations on Platydoris formosa are at Bill Rudman's Sea-Slug Forum!