It seemed like the sort of soft robotics idea that would be of interest to this community, and it made me wonder about fish swimming in general. ie, using flowio to build something that swims even faster than a cuttlefish - like a shark or dolphin. Even though the propulsion mechanism above is soft, it look looks like they are using conventional rigid controls to operate it.
Perhaps there are even ways to use the flowio system to work an artificial swim bladder to control depth.
Just brainstorming. I think this is a cool project and look forward to seeing where it goes!