National Geographic : 1984 Aug
Among the fastest swimmers in the their heads like a blanket as they slip ocean, killer whales reachestimated through the sea. A killer coming to the speeds of 30 mph. The fine structure of surface (below) rises a full 18 inches their skin and their hydrodynamic shape out of the water before breaking the allow this pair off the coast of British surface tension. Only the airfrom the Columbia (above) to cruisejust below whale's blowhole disturbs the thin the surfacewith barely a ripple. The envelope of water that begins at the line wateractually lifts over the domes of of its mouth and rises over its head.