Some South Australian scuba divers love doing it on the bottom! That’s where all the benthic action happens and is a treasure trove of sights and wonders most missed by pelagic divers.

Here on the bottom amid the sponges and ascidians a world of macro activity is constantly taking place. In this image a grazing nudibranch crests a sponge sporting tiny yellow communal ascidians. Meanwhile a little three fin lurks ready to photo-bomb.

While waiting for the perfect movement the little three fin must have done at least five circuits and was just not going to rest anywhere photogenic. Oh well, just capture the image and move on.

Here under Edithburg Jetty is one of South Australia’s most diverse, interesting, and beautiful benthic habitats where the action never ends.