Soon we won't need any living creatures in the sea, it'll all be robots :-D
"Some shipwrecks are too costly or dangerous for humans to explore, but many underwater robots are too disruptive and unwieldy to serve as substitutes. The Tallinn Institute of Technology's new U-CAT mapping robot solves that dilemma by imitating one of the ocean's more graceful creatures: the sea turtle.
The small machine uses flippers to get around instead of propellers,
preventing it from kicking up silt (which would obscure its camera) and
letting it turn on a dime."