Go here: http://creaturecast.org/archives/1064-creaturecast-diving-for-jellies for the full story on the fantastic Creaturecast blog.
CreatureCast.org brings you stories about the unexpected world of animals. In this episode, Dr. Phil Pugh talks about studying jellyfish that cannot be collected in nets, and about his first times seeing live ones. These jellyfish are called siphonophores.
This work is provided under a Creative Commons Attribution-Noncommercial No-Derivatives license. Music by The Golden Hours. Many thanks to the Bioluminescence Lab at the Monterey Bay Aquarium Research Institute for the submarine footage, which was taken at 1,044 meters depth.