Complete source list – 10 Interesting Facts About Bull Sharks!
http://www.sharksider.com/bull-shark/
http://www.bbc.co.uk/nature/19869336
http://en.wikipedia.org/wiki/Bull_shark
http://www.sharks-world.com/bull_shark/
http://www.iucnredlist.org/details/39372/0
http://www.nmfs.noaa.gov/sharks/FS_bullshark.htm
http://www.livescience.com/20806-bull-shark-picture.html
http://www.flmnh.ufl.edu/fish/sharks/statistics/species3.htm
http://animals.nationalgeographic.com/animals/fish/bull-shark/
http://www.flmnh.ufl.edu/fish/gallery/descript/bullshark/bullshark.htm
http://www.sharksavers.org/en/education/biology/how-bull-sharks-survive-in-fresh-water/
http://www.nwf.org/wildlife/wildlife-library/amphibians-reptiles-and-fish/bull-shark.aspx
