Umbrella Octopus (Opisthoteuthis sp.)

Photo credit: OOI-NSF/UW/CSSF
Umbrella octopi are known for their curious way of getting around – by using a combination of pulsing their webbed arms, moving their fins, and jet propulsion through a funnel, some compare it to a parachute being unveiled. Little is known about the Opisthoteuthis, except that it resides in the mesopelagic zone – up to 500 meters below the surface of the ocean. Specimens average ~7 inches in diameter.
References:
http://www.dailymail.co.uk/news/article-3125869/Scientist-considers-naming-unclassified-octopus-species-Adorabilis-overcome-big-eyed-cuteness-deep-sea-creature.html
http://www.cbsnews.com/news/pac-man-ghost-octopus-could-be-named-opisthoteuthis-adorabilis/