Problem 17

Background and context

Arthropod includes around 80% of the creatures that cover under the kingdom Animalia. Crustaceans have their unique characteristics that is different from other arthropods. Crustaceans  derived form a large and diverse arthropod taxon that includes crabs, lobsters, crayfish, shrimp, krill, woodlice, and barnacles. A crustacean has the following features:

• a segmented body with cover a hard exterior (known as an exoskeleton)
• jointed limbs and  with two branches in each (termed biramous)
• two pairs of antennae
• gills