featured video :: EAP-Blimp
The worldwide first EAP propelled airship was made at Empa in collaboration with aeroix GmbH and the Technical University of Berlin. This lighter-than-air vehicle with 8 m in length consists of a slightly pressurized Helium filled body of a biologically inspired form with Dielectric Elastomer (DE) actuators acting as muscles and deforming the body and tail fin in a fish-like manner.
Empa is an interdisciplinary research and services institution for material sciences and technology development within the ETH Domain.

Reminds me of the Festo Air Ray:
http://www.hizook.com/blog/2008/10/19/festo-manta-rays-dirigible-and-submersible
bellissimo ! congrats… love the flying fish…