Shaped like your most intuitive workshop implement, the Hammerhead Shark is one of the most distinctive sharks under the sea. Scientists have been arguing amongst themselves for years about the evolutionary function of their noggins, some argue that it is to improve either sensory input, maneuvering, prey manipulation or all three. The Hammerhead usually likes to swim in schools by day, then switches to solo-hunter mode at night. These unique predators can be found along almost every warm coast of the planet, from Costa Rica to Africa. There are only 11 species of Hammerhead shark, of those only 3 are considered to be ‘bitey’ to humans, none fatal, as of 2013 there have been 33 recorded attacks, none of them fatal. In Hawaiian culture, the Hammerhead is a sign of fortune, and to be passed by one is a sign that the gods are watching over your loved ones, and the ocean is clean. If you find yourself in the clean waters of Costa Rica, spend some time with a reputable dive operator, requesting a dive in an area frequented by Hammerheads. Rich coast diving is a well-reviewed outfitter, you would be served well to check them out: http://richcoastdiving.com/.