Goniobranchus geometricus Geometric Goniobranchus
© Di Syrett / MacroDivers.com
Home / Species Library / Goniobranchus geometricus About this species © Di Syrett / MacroDivers.com
Current scientific name Goniobranchus geometricus
Common name Geometric Goniobranchus
Previous genera Chromodoris
Order Nudibranchia - Doridoidea (Dorids)
Type Cryptobranchia (Cryptobranch dorids)
ID confidence Confirmed
Genus Goniobranchus
Species geometricus
Average size 35 mm
Colours white, black, green
Pattern Spots, Tubercles
Body shape Oval
Rhinophores Horizontal
Gills External gill plume
Similar species Goniobranchus hintuanensis Geographic Distribution Indian and western Pacific oceans.
Identification Common. Cute little nudibranch with black body and white circular tubercles. The simple gills and perfoliate rhinophores are tipped with green and both are retractable.
Want to learn more? Explore the MacroDivers Nudibranch Academy for practical guides to nudibranch anatomy, identification, behaviour, scientific names and responsible observation.
Explore the Nudibranch Academy Our Sightings
Location seen Lembeh, Indonesia
Date seen 2025-09-12 © Di Syrett / MacroDivers.com © Di Syrett / MacroDivers.com
Location seen Tofo, Mozambique
Date seen 2025-01-01 © Di Syrett / MacroDivers.com © Di Syrett / MacroDivers.com About our records All sightings and photographs on this page are from our own dives. Locations shown are places where we have personally recorded this species. About MacroDivers .