A body was found floating in the water off Coney Island Beach early Thursday, cops said. 

The unidentified man — believed to be in his 50s — was found drifting in the ocean close to West 21st Street around 7:50 a.m., authorities and police sources said. 

He was pulled from the water by the FDNY and pronounced dead.

There were no signs of trauma, cops said. 

The circumstances of his death were not immediately known.