Fact checkers say crabs lay more than once. I’m not a crab, I can’t say what’s true or false. Eggs are fertilized as they pass out of the crab's body and are deposited under the apron. The apron is actually the curled-under abdomen, and has small appendages to which the eggs attach. Egg masses have an average of two million eggs, and can have up to eight million eggs. Lordy, could you imagine? No wonder they only lay eggs once in their lifetime. I’m tired thinking about it. If I’m wrong ~ blame