Days like this, especially if you're sailing - which I think surprises seals and may even attract porpoise - you can see a lot of wildlife, both near and far.
In flat seas like this that we've seen whales on Penobscot Bay. It's hard to spot anything in the slightest chop.
I see some connection between seals and dogs(sea dogs as they've been called), when you watch their heads in the water. Take a dogs ears away and they look the same.