Tiger, Hammerhead and reef sharks are showing an increased presence due to each Hammerhead giving birth to around 20 to 40 pups during the month of May and June in Kaneohe Bay. (U.S. Marine Corps photo by Lance Cpl. Alesha R. Guard) - Tiger, Hammerhead and reef sharks are showing an increased presence due to each Hammerhead giving birth to around 20 to 40 pups during the month of May and June in Kaneohe Bay. (U.S. Marine Corps photo by Lance Cpl. Alesha R. Guard)