Lobster fishing industry, Maine - ..A breeding female lobster is marked on the tail. The notch signals to any fishermen that this is a breeing female who has to be returned to the sea. ..Strict size regulations are enforced: those too small are thrown back as well as the ones above a certain size: they are considered "superbreeders" and are returned to the sea. ..Due to these regulations, The lobster population of maine has not declined in spite of intensive fishing. ..