Lobsters have thick armour-like exoskeletons covered in sharp spines. They are also called crayfish. They have five pairs of legs, two pairs of antennae and a strong paddle for a tail.
They can walk using their legs and they have tiny paddles under their abdomen for slowly swimming. For a quick getaway they can shoot backwards at speed by flicking the large paddles on their tail.
They are very popular to eat and expensive in the shops. It is now difficult to find them in rockpools where they are easy for people to catch. They are now found in deeper water where they have better protection. You may see part of their skeleton washed up on the beach or into a rockpool.