Selection: Costasiella cf. kuroshimae

Costasiella cf. kuroshimae Ichikawa, 1993

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Costasiella cf. kuroshimae - cf. is an abbreviation from a Latin word (confer) and means 'refer to' or 'compare with',
here it means it could possibly be Costasiella kuroshimae or perhaps something closely related, or at least similar in appearance. I have never seen a specimen larger than 6 mm.
More informations on Costasiella cf. kuroshimae are at Bill Rudman's Sea-Slug Forum!