The skeletal remains of what appears to be a woman were found by a woman walking her dog in Lattingtown on Monday, Nassau County police said.
Police are investigating the case as a homicide.
The woman and her dog were walking in the sand at the end of Sheep Lane when they came across the remains about 3 p.m., police said.
The body is believed to be of a woman about 30, police said, adding that a necklace with what appears to be a gold pig pendant was recovered at the scene.
Anyone who recognizes the necklace or has any information should contact Nassau County Crime Stoppers at 800-244-TIPS or the Homicide Squad at 516-573-7789.