drives the ship forward displacing water. but seventy percent of the energy expended it actually goes to overcoming the resistance of the friction of the hollow in the water the fish bend it. shifts so. this little boat is already riding on air that isn't capsulated by a silvery water envelope a newly developed material that is applied to the underside of the boat makes it possible if this were to work on a larger scale it could help reduce the use of toxic ship fuel by twenty five percent apart from that the ship's hull would no longer come into direct contact with the water so poisonous algae resistant paint would no longer be needed. the new material with its honeycomb structure works similarly to the salvia leaves . the researchers didn't build an exact replica of the leaf because the surface