Chromodoris Fidelis (Kelaart, 1858) [Doris]

Micromelo undata is characterised by a thinly calcified shell with wavy red/brown lines (as the specific name undata suggest, it is a Latin adjective meaning wavy) and large colourful body. It feeds on cirratulinid worms.
More informations on Micromelo undata are at Bill Rudman’s Sea Slug Forum!

Class:  GASTROPODA
Subclass:  OPISTHOBRANCHIA

Order:  CEPHALASPIDEA
Superfamily:  ACTEONOIDEA
Family:  Hydatinidae  Pilsbry, 1893
Genus: Hydatina Schumacher, 1817
Hydatina physis (Linnaeus, 1758) [Bulla]
Hydatina zonata (Solander in Lightfoot, 1786) [Bulla]
Genus: Micromelo Pilsbry, 1895
Micromelo undata  (Bruguière, 1792) [Bulla]
Superfamily:  BULLOIDEA
Family:  Bullidae  Lamarck, 1801
Genus: Bulla Linnaeus, 1758
Bulla ampulla  Linnaeus, 1758
Superfamily:  DIAPHANOIDEA
Family: Diaphanidae  Odhner, 1914
Genus: Colpodaspis Sars, M., 1870
Colpodaspis thompsoni  Brown, 1979
Superfamily:  HAMINOIDEA
Family: Haminoeidae  Pilsbry, 1895
Genus: Atys Montfort, 1810
Atys cylindrica (Helbling, 1779) [Bulla]
Atys naucum (Linnaeus, 1758) [Bulla]
Genus: Haminoea Turton & Kingston, 1830
Haminoea cymbalum (Quoy & Gaimard, 1833) [Bulla]
Haminoea ovalis  Pease, 1868
Genus: Liloa Pilsbry, 1921
Liloa sp. A  Genus: Pilsbry, 1921
Superfamily:  PHILINOIDEA
Family: Aglajidae  Pilsbry, 1895 (1847)