Specialists tell The Boston Globe it's called a "yellow lobster" and it's one in 30 million.
The lobster now named Fiona was recently caught off Canada. It was given by a friend to Nathan Nickerson, the owner of Arnold's Lobster and Clam Bar in Eastham, on Cape Cod.
New England Aquarium director of research Michael Tlusty says a rare genetic mutation produces yellow lobsters.
Life isn't easy for such animals. Their bright colours make it easy for predators to spot them.
Nickerson said the human predators at his restaurant will never get Fiona. He said it would be like steaming a Rembrandt.