species: Trinchesia sibogae in Lizard Island area: all known taxa (Lizard Island Field Guide)
Trinchesia sibogae

©Brogan Mancell: Trinchesia sibogae at Cobia Hole, Lizard Island.

©Anne Hoggett: Three small individuals of Trinchesia sibogae on a hydrozoan at North Point, Lizard Island.
Kingdom Animalia
Phylum Mollusca
Class Gastropoda
Order Nudibranchia
Family Trinchesiidae
Genus Trinchesia
Species Trinchesia sibogae



Distinguishing features

Cerata arranged in fan-like clusters on each side of the body. Pale purple with orange tips on the cerata. Food source is reported to be the hydrozoan Sertularella quadrispinosa (Sea Slug Forum website accessed 31 Aug 2021). It is not known if that is the species of hydrozoan photographed here.


  • Up to 3.5 cm (length according to Sea Slug Forum website accessed 31 Aug 2021)



©Atlas of Living Australia: Australian distribution

Web resources


References that assist with identification

  • Humann, P. and N. Deloach (2010). Reef Creature Identification: Tropical Pacific New World Publications Inc., Jacksonville, Florida, USA.

Other references

  • Waegele, H., I. Burghardt, N. Anthes, J. Evertsen, A. Klussman-Kolb and G. Brodie (2006). Species diversity of opisthobranch molluscs on Lizard Island, Great Barrier Reef, Australia, In: Contemporary studies into the systematics and evolution of opisthobranch molluscs, (Eds. G. Brodie, S. Fahey and F.E. Wells), Records of the Western Australian Museum, Supplement 69: 33-59. LIRS catalog number 1036.