DO You Know

6 February, 2020 12:00 AM printer

•    Both crabs and lobsters are decapods, or crustaceans with 10 limbs. Other decapods include crayfish, prawns and shrimp.

•    While lobsters have a long, segmented abdomen that sticks out at the back of their bodies, crabs have a similar but smaller abdomen that is curled up underneath the main shell.

•    Most crabs have flat bodies that enable them to squeeze into very narrow crevices.

•    A crab’s shell is really a skeleton on the outside of its body. Insects and spiders also have external skeletons.

•    The largest crab in the world is the giant Japanese Spider Crab, which can measure up to 13 feet across.

•    Horseshoe crabs are not crabs at all. They are not even crustaceans. Instead, they have their own separate class named Merostomata. They have hardly changed since the age of the dinosaurs, and their closest-living relatives are spiders.

•    There are two kinds of crabs. The first kind is true crabs, or brachyurans, which have a very short abdomen and use four pairs of long legs for walking. True crabs include blue crabs, spider crabs and ghost crabs. The second kind is false crabs, or anomurans, which have a longer abdominal section and fewer walking legs.

•    There are about 5,000 species of crabs. Only about 4,500 are true crabs. The other 500 types are false crabs and include hermit crabs, king crabs, porcelain crabs, horseshoe crabs and crab lice.

•    Crabs are also known as “spiders of the sea” because, like crabs, spiders have legs that bend at joints.