Image JB_PR_NH001. Tunicate colony of Didemnum vestum? (provisional identification from photo) encrusting rock surface on river bed. Piscataqua River, Newington, NH (43 deg 6.47 min N lat, 70 deg 47.84 min W lon). Water depth 40-50 feet (12-15 m). October 29, 2002. Photo credit: Joseph Battaglia (MRI). Location no. 34. Click here to download image.