Combine a graceful sea creature in its natural environment with some ethereal music and you've got this video. From the YouTube link:
Making a rare appearance just in time for Halloween, this ghostly-looking orange cirrate octopus was recently observed by MBARI's ROV Doc Ricketts swimming over the Taney Seamounts. These finned octopuses belong to an order of animals called Cirrata named for the presence of hair-like structures called 'cirri' which may aid these animals in the capture of food.
-via Boing Boing