Researcher Neil Hammerschlag has been tracking sharks for 10 years . The process usually takes just a few minutes from the time it is reeled in until the shark 's release . He says the number of attacks on humans is increasing and that it could be a sign of things to come in the future. Hammerschlag and his team catch sharks , then tag them with transmitters . It 's still unclear if the sharks are avoiding the oil spill .
Researcher Neil Hammerschlag has been tracking sharks for 10 years . He says the number of attacks on humans is increasing and that it could be a sign of things to come in the future. Hammerschlag and his team catch sharks , then tag them with transmitters . It 's still unclear if the sharks are avoiding the oil spill .