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Nudibranchs of the Sunshine Coast,
Queensland, Australia, Indo-Pacific

Nudibranch emoji will not happen!


After preparing a Nudibranch emoji and sending it and the form to Unicode for approval there came an email later rejecting the Nudibranch emoji - "The potential usage and statistics do not meet current expectations, although the proposal is nicely done." So you see there will never be a Nudibranch emoji...

Pic of the Week


Another tiny wonder of the sand.


Retusa amphizosta

A pretty common species in the river.


I always get excited when I come across a live Retusa animal. This simple bubble-shell sea slug has a charaterictic shell with a white body. You can the head shield which allows the animal to plow through and sand in search of prey.


The shell measures 2-3 mm and has an inverted spire. Different from the usual sea shells you see, hence the flat end on the right. Bob Burn explained that the black dots you see through the shell are the animals digestive grinding plates. The animal also has an unusual way of travel. The front of the body pushed forward and anchor while the shell catches up...repeat.



Photo and text by Gary Cobb, Mooloolah River, La Balsa Park, Buddina, Sunshine Coast, Queensland, Australia



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Our Mission


LOCATE, RECORD, IDENTIFY and POST every species of HETEROBRANCH to be found on the Sunshine Coast Queensland, Australia.


To LOCATE through scuba diving and intertidal searching.


To RECORD by underwater and studio/taxonomic photography (including microscopy photography) of the specimens.


To IDENTIFY these species through invaluable support from qualified authorities in this field and developing reference resources.


To POST upon our web site not only images of the species and their natural history behaviour but also information concerning size abundance and localities. Additionally to disseminate to other sites information considered unusual.


Towards achieving these aims we will continue to acquire and develop the necessary equipment, resources and knowledge.


Have fun, learn and enjoy the Earth's greatest creatures!

Learn more>


Parting note.

Nudibranchs are amoung the most ephemeral of marine creatures. They greatly vary in size, colour and shape. They can be almost invisible or very bright and easy to see. Learn more>



Peak Baggers Guide



Our Latest Find

Tenellia puellula (Baba, 1955)
3 mm - La Balsa Park, Mooloolah River, Sunshine Coast, Queensland, Australia


Fran and Nevars Happy Nudibranchs

About this Nudibranch website

NOTE: From 2003 to 2018, content on this website was generated by Gary Cobb, David Mullins, with Terry Farr and Julie Schubert. From 2019, content has been generated by Gary Cobb.


We embarked upon this adventure of ours while diving here on the Sunshine Coast, Queensland, Australia. Upon realizing the amazing variety of nudibranchs we were seeing, we developed an appetite for not only finding as many different species as possible but identifying and learning all we could about these most amazing creatures of the sea.
Naming Nudibranchs was born when a friend of Gary’s suggested we share our knowledge with the world. The site commenced in March 2003 when we set out on our quest to find, identify and record all of the nudibranchs here in our area. The ever changing sea and seasons give up new surprises every visit whether they are subtidal or intertidal.


Nudibranch Central

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We describe our searching and identifying component of the quest as The Treasure Hunt, and the recording thereof upon the web site as The Never Ending Story.


We welcome for inclusion on the site the findings of other workers in this area that we may not have yet recorded.


From this website a Nudibranch Identification book called Undersea Jewels - A Colour Guide to Nudibranchs was published in 2006. The book is a 'Colour Guide'. After all that is the first thing anyone remembers about first seeing a Nudibranch.


Nudibranch Central



Nudibranch webmaster Gary Cobb

All photographs and content © 2003-2021 Gary Cobb and contributing photographers.