Visitors to a park in Brooklyn, New York were enjoying their weekend when they spotted something extremely worrying — a four-foot alligator, floating in a pond not far from where families and children play.

The alligator was spotted off the shore of Duck Island by a passerby. That individual notified the city.

“It’s totally unexpected,” Joseph Puleo, the vice president of District Council 37, which includes the park, told The New York Post.

He noted that the alligator “wasn’t really moving at all,” possibly because winter in New York is significantly cooler than the tropical climate the reptile needs to stay healthy.

City workers successfully removed the alligator from the pond and transported it to an animal care facility for examination and treatment.