Mesmerizing Footage Of Undiscovered Deep-Sea Life

Our oceans cover more than 70% of Earth’s surface. While the ocean remains largely unexplored, we occasionally get a glimpse of the weird and wonderful creatures that eke out a living in the deep. There are countless creatures on this planet we'll likely never discover. There are many creatures, some cute, some terrifying, and most of us know little about them.

Blue dragon nudibranch (Pteraeolidia ianthina): This brilliant nudibranch is often seen on many of our shores, in coral rubble and near reefs. It is also commonly seen by divers. They are 3-5cm. Long, narrow, soft body with finger-like projections (called cerata) arranged in hand-like clusters along the length of the body. Those encountered were mostly blue, sometimes also mostly brown with blue tipped cerata. Elsewhare, various colours are reported from yellow to green. It is identified by the purple bands on its long oral tentacles. It has a pair of shorter feathery rhinophores. A recent study suggests this species comprises a cryptic species complex, with what is currently perceived as a single species actually being multiple genetically-distinct species that look almost indistinguishable to the naked eye.