Doris immonda (Risbec, 1928)
- Location
- Red Beach, Okinawa Island (East coast), Okinawa, Japan
- Date
- 2016/05/21
- Length
- 10mm
- Depth
- 5.0m
- Water temperature
- 24.0℃
Description
Ground colour orange to green with scattered minute tubercles on the dorsum. An irregular greyish-brown patch extends from between the rhinophores to in front of the gill, narrowing or breaking up centrally. Tubercles within this patch are larger than those elsewhere. Rhinophore stalks white, clubs dark brown. Gill the same colour as the body, with the leaflet margins sometimes tinged dark brown. Reaches 15 mm.Distribution
New Caledonia (type locality), eastern Australia, Norfolk Island, Papua New Guinea, Philippines, Japan, Hawaii, Marshall Islands, Costa Rica.Etymology
Latin immunda, "unclean, dirty."Remarks
Originally described as Platydoris immonda Risbec, 1928. Subsequently placed in Siraius by Brodie & Willan, and now returned to Doris.References
- Platydoris immonda, Risbec J. (1928). Contribution à l'étude des nudibranches néo-calédoniens. Faune des Colonies françaises, Tome II: 1-328, 12 pls. (Société d'Éditions géographiques, maritimes et coloniales, Paris). [doctoral thesis monograph]
- Siraius nucleola サンカクウミウシ（新称）, Kikutaro BABA (1993). A New Record of Siraius nucleola (Pease, 1860)(Nudibranchia : Dorididae) from Japan. Venus (Japanese Journal of Malacology), 52(4), 291-297. doi: 10.18941/venusjjm.52.4_291. Available online at https://www.jstage.jst.go.jp/article/venusjjm/52/4/52_KJ00004344060/_article/-char/ja/
- 高岡生物研究会. (2002). 日本海のウミウシ. 第2版.
A Kindle field guide by the site author
Kimoto N. (2026). Sea Slugs of Japan & the Indo-Pacific, 2nd Edition.
Kindle Edition
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Photos of Doris immonda
Same Genus Nudibranchs
Similar Colors Nudibranchs
Academic Database
Sea slug observation data is available in international marine biodiversity databases.