Professor Neil Hammerschlag has been studying sharks for 10 years . Now , his research is focusing on the effects of the oil spill . Hammerschlag and his team catch sharks , then spray them with oil . It 's still unclear if the sharks are from the oil spill .
Researcher Neil Hammerschlag has been tracking sharks for 10 years . Now , his research is focusing on the impact of the oil spill . Hammerschlag and his team catch sharks , then tag them with transmitters . It 's still unclear if the sharks are avoiding the oil spill .