Considering we've only explored deep sea area roughly the size of Paris, it's vital we protect the little life we have encountered. Endangered blobfish, whose skin allows them to float just above the ocean floor, are one kind of fish we've only recently discovered - and their obscurity could be a death sentence.
Blobfish are unique to the waters surrounding Australia and Tasmania and live up to 900 m. under the sea.
http://www.thepetitionsite.com/takeaction/349/466/602/