A lobster must grow to the appropriate size to be harvested after 5 to 7 years. A lobster will weigh about 1 pound when it reaches the minimum permissible size. (Based on the 3 1/4" minimum carapace size required by Maine law.
The Gulf of Maine is the only body of water that is warming more quickly than the ocean overall, according to Frederic. "Lobsters are cold water animals. When the oceans grow warmer, lobsters move into deeper, colder water, modify the period when they moult, and become more susceptible to diseases.
The lobster will reach minimum legal size and weigh about one pound. Once a lobster reaches the minimum permissible size, it can only moult once a year and grow by roughly 15% in length and 40% in weight. Nobody has yet discovered a means to precisely calculate a lobster's age.
