Yesterday from the shore of Herring Bay, I was watching a flock of ducks maybe 300 yds offshore in about 4 maybe 5 ft of water. Too far for me to know what kind but about 100 loosely scattered.
Saw horizontal splashes about a yd long and a ft or 2 high in and around the flock, maybe 3 -4 of them and as the splashes continued the ducks gathered up as a tight group and swam south fast, didn't fly.
Meanwhile gulls are diving into the group like over blues feeding. First thought it was diving and resurfacing ducks but splashes were too big. Grabbed binoculars and could almost be certain that the splashes were something coming up from the water, not gulls or the ducks themselves. After a few minutes the splashes slowed and quit and the ducks slowed and dispersed a little. I have seen big blues bring down ducks this way years ago. Couldn't see anything in the splashes but it was a long way
But whats still in the Bay that can do this???