description=Off islands and undersea pinnacles, schools of scalloped hammerhead sharks (Sphyrna lewini) can often be encountered. Swimming in the midst of a school of hundreds of sharks is exciting but surprisingly safe. The sharks are timid when gathered in great groups like this, and they flee at the sound of a diver's bubbles.ìÄìÄLocation: Sea of Cortez, Baja Mexico. ìÄ