Q. Are there really alligators living in the sewers of New York, flushed down as overgrown pets, or is this just a fanciful urban legend? A. “I suppose they could live there for a time,” says University of Wisconsin zoologist Jeffrey R. Baylis. Sewer water is warmer than groundwater; this would help. Gators hunt at night, so darkness would not be a problem so long as they got some light. Rats and other small animals could provide food.