Scientists say for the first time they’ve tracked a white shark in Long Island Sound. Researchers have recorded a resurgence of the seal population in our region. And a local aquarium is pushing a ban on plastic bags to help keep the waters clean. How is marine life changing in our area? Our guests: Greg Metzger, chief field coordinator, Shark Research and Education Program, South Fork Natural History Museum Dave Sigworth, associate director of communications, Maritime Aquarium Erica Cirino,