Researchers use side-scan & multi-beam sonar to get a good picture of what the passage of the storm did to the sea bed. Beneath the 20-foot waves that crested off Delaware's coast during Hurricane Sandy, thrashing waters reshaped the floor of the ocean, churning up fine sand and digging deep ripples into the seabed. Fish, crustaceans and other marine life were blasted with sand as the storm sculpted new surfaces underwater. University of Delaware (UD) scientists cued up their instruments to document the offshore conditions before…