Dolphin sightings in the Chesapeake Bay have been on the rise in the past few years, increasing from a sighting here and there to sightings of large pods daily. Dolphins were once regular inhabitants of the bay, but steadily decreased as pollution increased in the 20th century. Now that the water is cleaner than years past, submerged aquatic vegetation has rebounded, and fisheries are recovering, it has become the inviting space it once was for dolphin. Researchers have set up a website to track dolphin sightings. Through the website data they receive, it is estimated that there are thousands of dolphins residing in the bay during the warmer months.

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