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Maine.gov

Lobster fishermen throw back lobsters that are too small and lobsters that are too big. The small ones need to grow, while the large ones add vigor to the gene pool. In Maine, a lobster’s body must be at least 3 1/4 inches to keep, and can’t be over 5 inches. When lobsters mate, the eggs aren’t fertilized right away. The female carries the male’s sperm and chooses when to fertilize her eggs.