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Nudibranch Domain

Images and Information about Sea Slugs from around the world

This is a site for aficionados of nudibranchs and their sea slug relatives, who want more than pretty pictures. At the launch the site is populated with an image of each species sighted on the Sunshine Coast, southern Queensland, Australia by  The Sunshine Coast Sea Slug Survey Team.

As the site develops, information, more images and references about each of the species will be added providing a helpful and valuable resource. The many hundreds of Indo-Pacific species, recorded by The Team when overseas, will also be regularly added significantly broadening the resource.

There are three ways to get your hit of Sea Slug knowledge.

  1. Species Profile features information about specific sea slugs. Navigate, Identify and Learn about species via the lists. Notification of the latest expanded entry will appear below on the Home Page.
  2. NudiNote features specific topics that can be sourced via its Archive. Notification of the latest entry will appear below on the Home Page.
  3. Understanding Nudibranchs is a book on general sea slug biology and behaviour that will be posted in parts, as they are completed.

Home to The Sea Slug Survey of the Sunshine Coast

The Sea Slug Snippet

Glossodoris hikuerensis (Pruvot-Fol, 1954)

Smooth mantle, brown with small white reticulation all over. Three bands to sinuous mantle margin, pale brown outermost, followed by white, then a darker innermost band from blue/grey through to black. Rhinophores pale brown with white speckling and white stripe up anterior midline.

Currimundi Reef, Sunshine Coast, Qld, Australia.


Latest NudiNote

NudiNotes are interesting and informative short articles about sea slugs and their behaviour. 

CERATA: The Multifunctional “Fingers” of Sea Slugs Part 1 – Introduction

CERATA: The Multifunctional "Fingers" of Sea Slugs Part 1 - Introduction The term cerata (singular: ceras) is most often associated with the processes that arise from the dorsum of the Aeolidina - the aeolid nudibranchs. However, it is also commonly applied to the...

HUNTER SEA SLUGS – Brittle Stars, Worms, Bivalves and Crustaceans as prey

HUNTER SEA SLUGS Brittle Stars, Worms, Bivalves and Crustaceans as prey In this NudiNote on sea slug feeding we look at those that are hunters, those sea slugs that actively track down their mobile animal prey as opposed to the majority of sea slugs that are consumers...

Lookalikes to Look Out for – No. 3. – Ceratosoma trilobatum, Ceratosoma tenue & Ceratosoma gracillimum

Ceratosoma trilobatum - Ceratosoma tenue - Ceratosoma gracillimum In No. 3 of this series there are actually 3 species to compare. These 3 are quite often confused and there are good reasons for that confusion. All were described not last century but the century...

VEXATIOUS VARIABILITY – No. 3 Goniobranchus splendidus

VEXATIOUS VARIABILITY - No. 3 Goniobranchus splendidus Goniobranchus splendidus is a common and conspicuous species of nudibranch, though endemic to the east coast of Australia, from southern New South Wales to central Queensland. It exhibits variation in...

MORE COLONIAL CONSUMERS – Sea Slugs that prey on Ascidians, Bryozoans and Entoprocts

More Colonial Consumers Sea Slugs that graze upon Ascidians, Bryozoans and Entoprocts It’s been mentioned before that the feeding preferences of sea slugs, across the entire group, encompass an extremely diverse range of food types, but conversely, each species...

VEXATIOUS VARIABILITY – No. 2 Goniobranchus geometricus

VEXATIOUS VARIABILITY - No. 2 Goniobranchus geometricus Goniobranchus geometricus, to the uninitiated, can appear very much like a phyllidiid nudibranch if the gill is not displayed - all black and white and lumpy. However there are, from time to time, other...

VEXATIOUS VARIABILITY – No. 1 Hypselodoris jacksoni

VEXATIOUS VARIABILITY - No. 1 Hypselodoris jacksoni There are a number of common species of nudibranch that can exhibit a variability of presentation. These differences can sometimes be put down to geographical location but more than often, not necessarily so. At...

THE STING’S THE THING – Sea Slug Predators of Anemones and Hydroids

“The Sting’s the Thing” Sea Slug Predators of Anemones and Hydroids Have you ever inadvertently brushed past a stinging hydroid during a dive and some small part of your skin, being exposed, receives a searing sting? Or perhaps you have been enjoying the surf and a...


Phyllidiid Suctorial Feeding We are occasionally fortunate enough to encounter and record a nudibranch feeding, that is, to actually see that they are feeding, because most often the process is hidden from us beneath them. In those instances, with the sponge-feeders,...

SPONGIVORES – The Sponge Eaters

SPONGIVORES - The Sponge Eaters Sponges (Phylum Porifera) are one of simplest and oldest of multicellular animals. They have the least complex body form of the multicellular animals. Only a few specialist predators are known to be exclusively spongivores, that is, to...

The current NudiNote is displayed above. Click to read more or slide to earlier NudiNotes using the arrows which appear when hovering over the image. Alternatively all the NudiNotes may be accessed via the button on the navigation bar above.

Species Profile

All species sighted have been listed on the website with at least one image. There is an ongoing update process whereby information about each species including references and additional images will be added. As each species is enhanced it will be featured here as a temporary notification of that latest update.

Information about this species has been added to its page with references. Additional images have been added to the gallery.

News and Updates

Dive Reports are now being posted giving details of our Sea Slug Surveys. All the Dive Reports to date for 2021 are posted. Historical Reports will be added progressively. Access via Dive Reports on the Menu Bar then select a date/site.
Provision is also being made to post Sea Slug Videos – coming soon.