Scientists have found hundreds of new species and huge underwater mountains in a marine park in Australia.

Experts say the discovery could force marine biologists to re-write their textbooks.

This rare species of ray is one of 86 creatures previously unknown in Australian waters.

It's one of many ground-breaking findings scientists have made off the coast of southern Tasmania.

These waters, according to researchers, are home to over 270 previously unknown species in a landscape of extinct volcanoes and underwater canyons.