If the concept eventually succeeds, it will enable amphibious exploration of gas-giant moons, notably Europa. It likely is relevant to other moons of Jupiter and Saturn with liquid lakes or oceans. Juno's success notwithstanding, solar power near Jupiter is very limited. Furthermore, the recent cancellation of SMD's ASRG technology motivates finding alternatives to nuclear power. The bio-inspired technologies we propose to consider bypass the need to power rovers with limited-lifetime batteries, large solar arrays, or nuclear power. This breakthrough should be considered in contrast to more familiar Europa rover designs, many of which involve nuclear power or primary batteries that severely limit lifetime and power-to-weight (~ 100W/kg power density for our concept vs. 1-5 W/kg at best for nuclear systems). Beyond addressing issues of power, this rover concept also bypasses the difficulties of typical mechanisms in fluid through uniquely suited soft robotics. The expanding-gas locomotion concept is both novel and eminently realizable, grounded in experimental work by our team. The multiple-use philosophy here exploits synergies among structure, power, and the environment in a way that differs from typical rovers, where stovepiped subsystem designs do not take advantage of prospective mass savings. Additionally, many of the proposed systems are useful to marine operations on Earth, where batteries or energy harvesting devices could be used to power the electrolyzer subsystem. Extending the applicability of this exotic concept to terrestrial applications is in the best traditions of NASA's spinoffs and offers additional economic benefit. This study also is expected to offer NASA a return on its investment in the nearer term. This work will assess the possibility that any life on Europa may be powered by electromagnetic energy, with singular implications for astrobiology. That scientific benefit may influence future directions in Europa exploration. More broadly, this study will serve as a pathfinder that introduces soft robotics into future rover trades.