Environmental Monitoring and Assessment Program (1990-1998), National Coastal Assessment (2000-2006), National Aquatic Resource Surveys (2000-2015)
These data are from EPA's national coastal monitoring programs and include data from the water column, sediments, and biota, 1990-2015. 

This dataset is associated with the following publication:
Hale, S., H. Buffum, J. Kiddon, and M. Hughes. Subtidal Benthic Invertebrates Shifting Northward Along the U.S. Atlantic …