http://www.enchantedlearning.com/subjects/sharks/species/Hammerhead.shtml

http://answers.yahoo.com/question/index?qid=20110109163223AAxkujM

http://www.livescience.com/13020-hammerhead-shark-satellite-tracking.html

http://mentalfloss.com/why-do-angelfish-feel-safe-inside-mouths-hammerhead-sharks-they-share-symbiotic-relationship-natural

http://darwinsreef.pbworks.com/w/page/66229850/Hammerhead%20Shark

http://prezi.com/2nfe_fim5qmw/the-great-hammerhead-shark/