Hypselodoris apolegma
Hypselodoris apolegma is a species of colourful sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae. Taxonomic history
Recent phylogenetic data confirm the validity of the species and suggest a sister species relationship between Hypselodoris apolegma and Hypselodoris bullockii. A later study revealed a large clade of animals with similar colouration with Hypselodoris brycei as sister species to H. apolegma. Distribution
This nudibranch is found in the tropical Western Pacific Ocean. References

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Chromodorididae
Gastropods described in 2001