Over the past century, Boston Harbor's average annual temperature has climbed three and a half degrees. Scientists say that this slow climb is creating significant changes in the ocean's ecosystem.

WGBH News' Stephanie Leydon reports, in part two of our FOCUS report on climate change, there is evidence that warming waters are impacting one of the region's most vital natural resources: seafood.


John Bullard is the regional administrator for the National Marine Fisheries service.  

Jackie Odell is the executive director of the Northeast Seafood Coalition.