Thorunna halourga R. F. Johnson & Gosliner, 2001
Description
Ground colour pinkish purple. A broad white border runs along the outer mantle margin, with a bluish-purple band immediately inside. The boundary between the white and bluish-purple bands becomes a dark purple in front of the rhinophores and behind the gills. Rhinophores pinkish purple with red lamellae; gills white with red plumes. Reaches 20 mm in length.Distribution
Western Pacific; recorded from Australia, New Caledonia, Papua New Guinea, Indonesia, Malaysia, the Philippines, Japan and Guam.Etymology
From Greek hals (sea) + ourgos (dyer / purple), meaning "sea-purple".Remarks
Thorunna is a genus of small chromodorids distinguished from related genera by mantle-margin colour bands and internal anatomy.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
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Photos of Thorunna halourga
Tag:
Same Genus Nudibranchs
Similar Colors Nudibranchs
Academic Database
Sea slug observation data is available in international marine biodiversity databases.