26K views · 1.2K reactions | Not your average looking slug  Nudibranchs are peculiar, punky underwater beasties. Their name literally means naked gill, as their respiratory organs are all on the outside. Although this one wasn't filmed in the Great Barrier Reef Marine Park, there are still plenty you can discover here, all different colours, shapes and sizes.  www.instagram.com/jacobguy.media | Master Reef Guides | Facebook