Do You Know Episode 13 What Do You Know about Lobsters


    Can you grow a new body when you get too big for your old one? Of course not. But lobsters can. They keep growing their whole life. As a lobster grows, it often molts. This means that it grows a new shell and casts off its old one. It even regrows any legs or claws it may have lost.

    What happens to the old shell when a lobster molts? The lobster eats it. People prefer to eat the tender meat inside the shell. Lobsters are also eaten by certain fish, octopuses, and even other lobsters!


    Lobsters are sometimes described as “shellfish.” But they are not fish at all. They belong to a group of animals called crustaceans. Unlike fish, crustaceans have no backbone—no bones at all, in fact. A lobster’s shell forms an outer skeleton that supports its body.

    A lobster has five pairs of limbs. Four of them are legs for walking. Its front pair ends in claws. It uses them to catch the animals it eats and to defend itself. One claw is much larger than the other. The smaller claw is for biting and the larger for crushing.


    Lobsters become able to mate and reproduce when they are five to eight years old. Females usually lay eggs every two years. They produce thousands of the tiny green eggs. Young lobsters swim near the ocean’s surface. Most of them are eaten by fish or other sea animals. Those that survive sink to the sea bottom when they are about five weeks old.

    Lobsters live on rocky sea floors 10 to 100 feet [3 to 30 meters] deep. They find holes in rocks or dig shelters in seaweed beds. They hide there from predators, especially when molting or mating. They come out mostly to feed. As they grow, their feeding area expands.

    Lobsters are scavengers. They eat dead creatures on the sea floor. But they also eat live animals, including crabs, clams, worms, snails, and fish. Lobsters usually hunt at night.

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