An Eastham seafood restaurant made a rare find on Monday when a blue lobster appeared in a shipment to Arnold’s Lobster & Clam Bar.

A post on the restaurant’s Facebook page encouraged customers to come in and see the lobster in person.

Well looky here—a BLUE lobster 😮! (Only 1 in every 2 million is blue!) This was brought into us after being caught in the Atlantic. Stop in to see it in person! Posted by Arnold's Lobster & Clam Bar on Saturday, June 8, 2019

Nathan Nickerson, the owner of the seafood restaurant on Cape Cod told NECN he hopes to donate 7-year-old “Baby Blue” to an aquarium.

According to the University of Maine’s Lobster Institute, only an estimated one in two million lobsters are blue and “the coloration comes from a genetic defect that causes the lobster to produce an excessive amount of a particular protein.”

Arnold’s Lobster & Clam Bar was ranked second in a MassLive Best of Mass. contest seeking the best fried clams in 2017.