Turtle or tortoise are the members of chelonid or testudinate order of class - Anppich of phylum - Repilin. Order-Chelonid includes marine turdes, terrestrial tortoises and freshwater termapins.
Pisces or fithes are defined as ectothermic aquatic vertebrates having jaws, gills, fins and a skin covered by scales. It has two groups (or superclass)-Aynuth (without jaws) and Gnathootoma (with jaws).
Amphicin is the class of tetrapods-which have aquatic larval stage and terrestrial adult stage. They were the first tetrapods to evolve during devonian.
Mimmalia is a group of most advanced chordates, which are homolothermal, hairy tetrapods having mammary glands for suckling the young ones.