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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

Halgerda batangas Carlson & Hoff, 2000

​Oval in shape, high in profile. Ridges on notum with large tubercles at junctions. Additional smaller tubercles on ridges, randomly on notum and around mantle margin. Translucent white with network of fine orange lines. Tubercles orange surrounded by circle of white. Marginal tubercles without white circle. Gills and rhinophores large, translucent white many brown spots.

Marikaban Island Passage, (Anilao), Philippines.


Latest NudiNote

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


Above: Doto rosacea, displaying all the standard Dendronotina characteristics -  large rhinophoral sheaths, branching appendages arranged down the lateral sides of the notum and feeding upon hydroids. DELVING INTO DENDRONOTINIDS If you have been reading the NudiNotes...


NUDIBRANCH GILL GUARDING Shell-less but not defenceless The sea is full of hungry mouths, many many hungry mouths either lying patiently in ambush or constantly on the move, in all directions, hunting for any opportunity to take a bite and feed. The last thing any...

THE ALLURING ARDEADORIS – Some examples of the genus

THE ALLURING ARDEADORIS - Some examples of the genus Some nudibranchs are both a delight to find and undemanding to photograph. Every time I happen across a species of Ardeadoris, concerns of composition and exposure just melt away as I enjoy myself, capturing their...

RUDIE NUDIES – The Mating Game

RUDIE NUDIES - The Mating Game Nudibranch aficionados, those individuals who spend their time searching the ocean floor for the slimy objects of their desire, will at sometime or other have come across pairs of them conjugating. Because they fertilise internally (with...

CERATA Part 3 – Defensive Attributes

CERATAPart 3 - Defensive Attributes In the Aeolidina, (the aeolids) the cerata have certainly reached the apogee of development, therefore most of the discussion in this Part will pertain to that group. Defences in the aeolids are concentrated in the cerata and...

Table of Sea Slug Feeding Preferences

A generalized table indicating the diet of the major sea slug groups. Click the image below to view the full table (opens in a Google Sheet in a separate tab) About the table The above is just an image for navigation purposes and will not show the latest...

THURIDILLA ENTANGLEMENTS – Some observations on Thuridilla mating

Thuridilla Entanglements Some observations on Thuridilla mating Recently (Feb, 2022) I captured an image of a pair of our Thuridilla cf. splendens apparently engaging in the act of hypodermic insemination (shown above). The image shows both specimens of the pair with...

ILLUMINATION ENLIGHTENMENT – Bioluminescence in Nudibranchs

Plocamopherus ceylonicus displaying the four papilla-mounted bioluminescent globes arranged around the vulnerable gill. ILLUMINATION ENLIGHTENMENT Bioluminescence in Nudibranchs Species of the humble sea slug can possess unusual and extraordinary capabilities such as...

CERATA Part 2 – The Multiple Functions

CERATA Part 2 - The Multiple Functions In Part 1, an overview of cerata was given together with some examples of what are, and what are not, considered to be cerata and which sea slug taxa possess them. A list of their diverse roles was included. Here in Part 2 those...

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...

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

SEA SLUG VIDEOS are now being added to the Species Profile pages.
– If relevant to a NudiNote they will be placed into the appropriate one.
All videos are also archived under SUPPORT on the main menu.



Updated Species Profiles: