BERKELEY TOWNSHIP, N.J. (WPIX) — Authorities in New Jersey have identified a mysterious large animal skull that washed up on a beach on Memorial Day.

Island Beach State Park, in Berkeley Township, posted photos of the unexpected discovery on their Facebook page Tuesday.

“You never know what you are going to find on the beach after a storm,” they wrote.

On Wednesday, the New Jersey Department of Environmental Protection identified the skull as the lower jaw and skull of a Minke whale.

The skull was found by state park police on Monday, following several days of storms.

Before it was officially identified, park officials had asked followers on social media for guesses as to what it could be.

One user suggested it could be part of a small humpback whale skull, while another said it could be that of a baleen whale.

“That’s where my pterodactyl head went!” joked another commenter.