[UPDATE]: Dolphins are everywhere! The day before a dolphin was photographed in the putrid Newtown Creek, a fireboat captain says he saw two dolphins swimming in the East River. Captain Bill Hannan told the Daily News he spotted the animals near the Brooklyn Navy Yard on Tuesday. On Wednesday, Urban Assembly New York Harbor School educator Roy Arezzo and a colleague were "just amazed" when they saw a 7-foot dolphin in Newtown Creek. "We just stood there in awe—shouting, telling it to go back the other way. ... This is a once-in-a-lifetime sighting."

The director of the Riverhead Foundation for Marine Research and Preservation said his group would monitor New York City dolphin sightings and try to rescue the animals if it became clear they were in trouble. Dolphins have been spotted in waters around the city before, and a seal even called the filthy Gowanus Canal home several years ago.

Update (5:38 pm): Reports are coming across the police scanner of a "dolphin in the water" near the Brooklyn Navy Yard. An emergency service unit and the harbor unit have been called to the scene for an "animal rescue." We'll update as we learn more.