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

The restaurant claims this 7-year-old lobster was captured in the Atlantic Ocean. According to the Maine Lobstermen’s Community Alliance, about one out of every two million lobsters may come up in a trap colored blue.

The University of Maine (pdf) said that “the coloration comes from a genetic defect that causes the lobster to produce an excessive amount of a particular protein that gives the lobster that unique coloration.”

Arnold’s Lobster & Clam Bar in Eastham posted a picture of the lovely crustacean on Facebook with a caption read, “Well look here — a BLUE lobster!”

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

“It was pretty shocking,” Nickerson told the Cape Cod Times. “They’re so blue and so rare. It’s amazing that a genetic mutation can cause it. If you let it go in the ocean, I don’t know if it’ll survive or get caught again. They need to be protected.”

He added, “I can’t imagine anyone cooking a lobster like that that is so rare. That would be immoral”.