Nembrotha rosannulata

Tiles sea slug | Donut Nembrotha | Nudibranch
Nembrotha rosannulata
Nembrotha rosannulata, Port Stephens, NSW, Photo: Tom Davis
Nembrotha rosannulata
Nembrotha rosannulata, Port Stephens, NSW, Photo: Nicola Davis
Nembrotha rosannulata
Nembrotha rosannulata, Coffs Harbour, NSW, Photo: Ian Shaw
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Nembrotha rosannulata
Nembrotha rosannulata
Nembrotha rosannulata




Body a dull green colour with raised ridges and black pustules. The black pustules have an orange / pink ring around them and the rhinophores and gills are dark in colour. Usually found close to their food source a dark purple ascidian Sigillina cyanea.


Max Size: 10 cm

Sea Temperature Range: 17.9-23.1°C

Depth: N/A

Habitat Generalization Index: N/A

Also referred to as the SGI (Species Generalisation Index), this describes the habitat niche breadth of the species. Species with values less than 15 are found in a relatively narrow range of reef habitat types (specialists), while those over 25 may be found on most hard substrates within their range (generalists). Learn more here.

Conservation and Rarity

IUCN Status: Not Evaluated

Occurrence: Common (33.3% of sites)

Occurrence describes how often the species is found on surveys within its distribution. It is calculated as the % of reef sites surveyed by RLS divers across all the ecoregions in which the species has been observed

Abundance: Few (2 per transect)

Abundance is calculated as the average number of individuals recorded per RLS transect, where present.

Edit by: Nicola Davis