An estimated one in 2 million lobsters are blue. A genetic mutation causes a blue lobster to produce an excessive amount of a particular protein. The protein and a red carotenoid molecule known as astaxanthin combine to form a blue complex known as crustacyanin, giving the lobster its blue color. In 2009 a blue lobster was caught in New Hampshire; in 2011, two blue lobsters were caught in Canada, one off of Prince Edward Island, and another in the Esgenoôpetitj First Nation territory in New Brunswick; another was caught in May 2012 off Nova Scotia. Most recently a blue lobster was caught off Pine Point in Scarborough, Maine in August 2014, and was donated to a local aquarium to join 3 other blue lobsters.