A wayward dolphin that swam into a polluted New York City canal has died.
The Riverhead Foundation for Marine Research and Preservation says the dolphin died Friday evening. It doesn't know how the dolphin died.
In frigid weather, the dolphin wandered into the Gowanus Canal earlier Friday.
The dolphin appeared to be about 7 feet long. It surfaced periodically and shook black gunk from its snout in the dirty water.
Experts had hoped the dolphin would free itself from the area during the evening's high tide.
Authorities announced they would not try to rescue the dolphin. A passerby showed up and reportedly swam out to try to comfort the dolphin. It died around 6 PM.