The most notable change from the coastal forays to the deep sea is that the white sharks engage in “rapid oscillating diving patterns” or “bounce dives” when they are in the Café. These sharks dive in a V shape at night at 100-200m depths and immediately return back. While the reasons for this unusual diving behavior are unclear, scientists theorize that it could be related to the diversity and abundance of prey in this particular region. Or the dives potentially could be searching behavior – males seeking females in the clear, warm oceanic cafe waters.
Principal Investigator Dr. Barbara Block and her team at Stanford University’s Hopkins Marine Station have been using electronic tags to track shark migrations for years. She and her colleagues from the Monterey Bay Aquarium have found that a large number of white sharks that forage each fall in the waters off California migrate annually to an open ocean region halfway between Hawaii and Baja.