Thuridilla albopustulosa Gosliner, 1995
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Thuridilla albopustulosa ranges from a form with white-cream raised spots, as its name 'albopustulosa'
suggests, to animals like this one in which the raised spots have merged into rounded ridges. There is an
opaque white band along the edge of the parapodia. The rhinophores are basally white, the outer two-thirds are bright
orange red with a thin, often broken, median white line. It is found throughout the tropical Indo-West Pacific from
Japan across to South Africa.
Pretty similar is Thuridilla vataae
which differs by the dark blue colour and by having no median white line on the rhinophores.
More information on Thuridilla albopustulosa are on
Bill Rudman's Sea-Slug Forum!