Tardigrade are not human.
Cyclomorphosis ( also known as seasonal polyphenism ) is the name given to the occurrence of cyclic or seasonal changes in the phenotype of an organism through successive generations . Ecdysozoa [ ˌɛkdɪsoʊ-ˈzoʊə ] is a group of protostome animals , including Arthropoda ( insects , chelicerata , crustaceans , and myriapods ) , Nematoda , and several smaller phyla . Tardigrade . The first three pairs of legs are directed ventrolaterally and are the primary means of locomotion , while the fourth pair is directed posteriorly on the terminal segment of the trunk and is used primarily for grasping the substrate .