Post doctoral researchers Kim de Mutsert and Joris Van Der Ham pilot a small boat to gather fish samples off the coast of Grand Isle, LA. The samples will be used measure the short and long-term impacts of the oil spill on the local marine and marsh environment. ..Photographs from Grand Isle and surrounding areas impacted by the Deepwater Horizon Oil Spill. The spill is estimated to be gushing 35,000 to 60,000 barells of oil into the ocean per day. Difficulties installing monitoring devices at the source have made this number difficult to clearly ascertain. The spill is among the world's worst.