One day after a coyote craze gripped Manhattan, dolphin delirium struck Brooklyn.

This mixed-up dolphin — and perhaps a second flipping friend — has been splashing all week in the East River, the Newtown Creek and off the Navy Yard.

Yesterday, an apparently healthy dolphin was seen in the waters off Kent Street. “At this point right now, it seems the animal is free swimming and doesn’t seem to be in need of assistance,” said Rob DiGiovanni of the Riverhead Foundation, which helps wayward whales.

On Wednesday, cops chased a coyote in Chelsea.