Raja Ampat — 27 November 2025
- Location seen
- Raja Ampat, Indonesia
- Date seen
- 2025-11-27
Goniobranchus coi
Co's nudibranch
© Di Syrett / MacroDivers.com
About this species
- Current scientific name
- Goniobranchus coi
- Common name
- Co's nudibranch
- Previous genera
- Chromodoris, Glossodoris
- Order
- Nudibranchia - Doridoidea (Dorids)
- Type
- Cryptobranchia (Cryptobranch dorids)
- ID confidence
- Confirmed
- Genus
- Goniobranchus
- Species
- coi
- Average size
- 50 mm
- Colours
- white, black, yellow, purple, brown, pink
- Pattern
- Edged mantle
- Body shape
- Oval
- Rhinophores
- Horizontal
- Gills
- External gill plume
- Similar species
- Goniobranchus gleniei, Goniobranchus fidelis
Geographic Distribution
Indian and western Pacific oceans.
Identification
Attractive nudibranch with undulating lines giving a saddle look. Some also have spots on the outer edge of the saddle. The mantle has a purple edge running to a lighter shade and then brown. The simple gills are white and retractable. The lamellate rhinophores are brown and long when not retracted.
Our Sighting
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.