New York (CNN) -- A dolphin stranded in Brooklyn's highly polluted Gowanus Canal on Friday has died, according to the Riverhead Foundation.

CNN: Rescuers: Dolphin stranded in polluted New York canal dies

After being stuck in murky low-tide waters for most of the day, the Common Dolphin passed away Friday evening, according to Joanne Biegert of the Riverhead Foundation.

CNN: Rescuers: Dolphin stranded in polluted New York canal dies

The 33 turtles had been rescued more than three months ago by federal officials and state wildlife authorities from Louisiana, Florida and Georgia, as well as the Riverhead Foundation and the In-Water Research Group.

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"My only concern was that we give ourselves enough time to build the comprehensive and forceful publishing plan that Riverhead is well known for, " said Geoffrey Kloske, publisher of Riverhead Books.

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"It's very uncommon for a dolphin or any marine animal to be in the Gowanus, but it's happened before, " Rob DiGiovanni, Riverhead Foundation's director and senior biologist, told CNN Friday.

CNN: Rescuers: Dolphin stranded in polluted New York canal dies