The One in 2 Million

Blue Lobster

A blue american lobster (Homarus americanus), photographed at the New England Aquarium. An estimated one in 2 million lobsters are blue due to a genetic mutation which causes a blue lobster to produce an excessive amount of a particular protein. The protein combines with a red carotenoid molecuule known as astaxanthin to form a blue complex known as crustacyanin, giving the lobster its blue color.