 The summit runs July 9th through the 11th. Kevin Uretzky, Fox News. Days after a shark attack in Hawaii killed a famous surfer and actor Tamayo Perry, a shark sighting is making people nervous, prompting warning signs. The 12-foot-long shark was spotted swimming 30 yards from a break wall along Oahu's south shore. Beachgoers are being advised to check in with lifeguards before entering the water.