Decorifer insignis (Pilsbry, 1904)
- Location
- Tate Beach, Amakusa, Kumamoto, Japan
- Date
- Length
- 5mm
- Depth
- 2.0m
- Water temperature
- 18.0℃
Description
A minute cephalaspid only a few millimetres in shell length. The shell is ovate and resembles a grain of rice, with a smooth, glossy surface. The shell ground colour is milky white to pale brown, and the body extends beyond the shell when the animal is crawling.Distribution
Type locality: Hirado, former Hizen Province, Nagasaki Prefecture, Japan. The species occurs commonly on shallow sandy-mud bottoms along the coasts of Japan.Remarks
The Japanese vernacular "Kometsubu-gai" (literally "rice-grain shell") refers to the shape of the shell.References
A Kindle field guide by the site author
Kimoto N. (2026). Sea Slugs of Japan & the Indo-Pacific, 2nd Edition.
Kindle Edition
View on Amazon PR (Amazon Associates)Seasonality
Shooting Locations
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Photos of Decorifer insignis
Same Genus Nudibranchs
Similar Colors Nudibranchs
Academic Database
Sea slug observation data is available in international marine biodiversity databases.