as well as for its pugnacious and aggressive nature." He admits that "the bull shark is not a common species in New Jersey waters, but it does occur more frequently than the white." In an interview with Michael Capuzzo, ichthyologist George H. Burgess surmises, "The species involved has always been doubtful and likely will continue to generate spirited debate." Burgess, however, does not discount the great white: The casualties of the 1916 attacks are listed in the International Shark Attack File—of which Burgess is director—as victims of a great white. The increased presence of humans in the water proved a factor in the attacks: "As the worldwide human population continues to rise year after year, so does ... interest in aquatic recreation. The number of shark attacks in any given year or region is highly influenced by the number of people entering the water." However, the likelihood that one shark was involved is contested. Scientists such as Victor M. Coppleson and Jean Butler, relying on evidence presented by Lucas and Murphy in 1916, assert that a single shark was responsible. On the other hand, Richard Fernicola notes that 1916 was a "shark year", as fishermen and captains were reporting hundreds of sharks swimming in the Mid-Atlantic region of the United States. Ellis remarks that "to try to make the facts as we know them conform to the 'rogue shark' theory is stretching sensationalism and credibility beyond reasonable limits." He admits, "The evidence is long gone, and we will never really know if it was one shark or several, one species or another, that was responsible." In 2011, further study was conducted in the Smithsonian Channel's The Real Story: Jaws. The documentary takes a closer look at the series of events from different perspectives. It was demonstrated in the Matawan Creek attacks, for example, that the full moon of the lunar cycle, which would have coincided with the attacks, would have raised the salinity in the water by more than double just a few hours before high tide. This would support the theory that a great white could have been responsible. Other evidence such as Joseph Dunn's injury suggested that the type of bite was more likely made by a bull shark as opposed to a great white, leading some to believe more than one shark was likely involved in the five incidents. Revising science Before 1916, American scholars doubted that