Onlookers watch a dolphin as it struggles to swim in the headwaters of the Gowanus Canal in Brooklyn, New York

 
Onlookers watch a dolphin as it struggles to swim in the headwaters of the Gowanus Canal in Brooklyn, New York
Onlookers watch a dolphin as it struggles to swim in the headwaters of the Gowanus Canal in Brooklyn, New York, January 25, 2013. The sea mammal appeared to struggle in the narrow waterway that stretches 1.8 miles into Brooklyn from New York Harbor. REUTERS/Mike Segar (UNITED STATES - Tags: ENVIRONMENT ANIMALS)