When I began sailing 40 years ago, dolphins were something you only saw on the ocean or the very lower Chesapeake Bay. In the last 5 years they've become commonplace all the way up to the Bay Bridge, and farther. The last two times out I've had company, sometimes so close you hear them breathe,.
A change in water temperatures? I don't see why that would matter, given their range. A change in the migration patterns of the food supply, possibly temperature-influenced? Maybe, but fish populations have always been cyclical.
Not enough information to say. But fun. It seems they are around most on days where the wind is light and the sailing dull, so the company is appreciated.
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