Flabellina verrucosa

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red-gilled nudibranch:
red-gilled nudibranch (Flabellina verrucosa): This species is very similar to Red flabellina (Flabellina trophina), except that its rhinophores are smooth, bumpy, or warty, as opposed to finely annulate. Another difference is that F. verrucosa has a rounded oral veil ("snout"), whereas F. trophina has a blunt, triangular oral veil. Other diagnostic criteria, such as tail length (longer in F. verrucosa than F. trophina), length of white dorsal stripe (longer in F. verrucosa), and extent of white in cerata (one-fourth white in F. trophina), seem to be less reliable.

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