Researchers have discovered new areas of deep-sea rivers south of Tasmania that contain more than 100 orgin species, including coral, lobster and molluscs.
The mission, spearheaded by CSIRO, returned to Hobart on Wednesday after cutting a series of "underwater mountains" for four weeks.
Most of these mountains are protected in Tasman Fracture and Huon Marine Parks.
"We examined a total of 45 views and crossed seven in detail," said scientist Alan Williams in CSIRO in a statement.
The team found all kinds of underwater plants, including bioluminescent limes, ghost sharks, deep sea sharks and basketball targets.
"We now have a large amount of data about the animals living on seas and how their societies change deeply, and have a much wider picture of living in habitats adjacent to the coastal areas," Williams said.
And he said it will take months to fully analyze coral distributions. We have already seen healthy deep sea shells on many smaller sea lakes and raised ridges from the lake. "
"That means there are more of this important coral reef in Huon and Tasman Fracture Marine Parks than we previously realized."
While Jason Mundy, head of Parks Australia's Marine Protected Areas Branch, said that "research trips like these are crucial to helping us understand, appreciate and protect Australian marine parks".
"The pictures of this trip remind us of the extraordinary and versatile environments we protect in these special places."