·        75 percent of all animals belong to the phylum Arthropoda

·         Great flexibility of structure along with the general successfulness of the Anthropod plan (exoskeleton and jointed limbs) enables them to be extremely successful as a group of animals

·         Brine shrimp (also known as sea monkeys) are included in the crustacean group

·         Others are lobsters, crabs, shrimp, pill bugs, krill, barnacles and water fleas

·         Their colorful exoskeletons and active habits make them favorites to watch at aquariums and when scuba diving

·         Range in size from Stygotantulus stocki at 0.1 mm (0.004 in), to the Japanese spider crab with a leg span of up to 14 ft (4.3 m) and a mass of 44 lbs.