Lembeh — 29 August 2026
- Location seen
- Lembeh, Indonesia
- Date seen
- 2026-08-29
Ceratosoma gracillimum
Slender Ceratosoma
© Di Syrett / MacroDivers.com
About this species
- Current scientific name
- Ceratosoma gracillimum
- Common name
- Slender Ceratosoma
- Order
- Nudibranchia - Doridoidea (Dorids)
- Type
- cryptobranchia
- Genus
- Ceratosoma
- Species
- gracillimum
- Average size
- 120 mm
- Colours
- white, yellow, orange, brown, red
- Pattern
- mottled
- Body shape
- With Appendages
- Rhinophores
- Horizontal
- Gills
- External gill plume
- Similar species
- Ceratosoma tenue, Ceratosoma trilobatum
Geographic Distribution
Indo-Western Pacific.
Identification
A large and robust animal with appendages (lobes) - one on each side and one on the top protecting the gills. It varies in colour from yellow, through orange to red/brown. All have white mottling/speckles. It has a wedged shapes head, a long tail and no distinct mantle. The lamellate rhinophores and the branchial gills can be retracted.
Behaviour / Habitat
Mostly found crawling across a sandy bottom.