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Philippines · Indo Pacific - South China Sea
A medium-sized chromodorid nudibranch described in 2018 by Matsuda & Gosliner. It was long confused with Glossodoris cincta and was separated on colour details, internal anatomy (radula) and DNA.
Share link: https://seaslugs.org.il/species/glossodoris-acosti-phillipines-indo-pacific-south-china-sea/
Elongate-oval brick-red to brown mantle with scattered white spots. The mantle edge has three fairly wide marginal bands in subdued colours: light blue outermost, dark green in the middle and yellowish green inside. The gill is very large, with dark-tipped branches that form two distinct spirals when fully extended.
Glossodoris cincta and Glossodoris sp. cf. cincta look almost identical; G. acosti has wider marginal bands and a much larger gill, but reliable separation may need close-up photos of the bands and gill.
Tropical coral and rocky reefs; recorded around 18 m.
Like other Glossodoris, feeds on sponges.
