The Bonnethead shark is the smallest member of the Hammerhead family, reaching only about four feet in total length. It is found in tropical waters of the Atlantic coast from New England, through the Gulf of Mexico and well into South America. It is also found from the Baja peninsula through the west coast of Mexico and Central America. Bonnethead sharks usually occur in small schools of up to 15 individuals. When migrating, they can be found in schools of hundreds or thousands. Scientists believe that the Bonnethead shark contains a specialized type of cerebrospinal fluid that helps Bonnetheads communicate chemically when another Bonnethead is nearby. They are considered harmless to humans.
The Brown shark, also known as the Sandbar shark is commonly found in public aquariums. The genus name Carcharhinus is derived from Greek words meaning “sharpen nose”. It is a coastal-pelagic shark that lives in temperate and tropical waters throughout the world. It is naturally a bottom-dwelling shark found in shallow coastal waters, and is known to be highly migratory. The Brown shark is an important species in commercial fisheries along the Eastern United States, and is the primary targeted species in this area. Because of its age at reproduction and the fact that it reproduces every other year producing a small number of young, the Brown shark is vulnerable to over-exploitation. Although rarely associated with attacks on humans, the size of the Brown shark makes it a potential threat.