Mwaranzi ihove yakati sandara. Vanogara mumakungwa ose enyika uye mugungwa rakadzika. Dzine miviri yakati sandara uye miswe mitete mirefu. Muviri, musoro, uye zvimbi zvakakura zvakabatanidzwa. Saka zvinoita sekunge zvese "chidimbu chimwe".
Mwaranzi inogona kukura kusvika mamita mapfumbamwe kureba. Muromo, mhino, uye matinji zviri nechepasi. Pamusoro pane maziso uye maburi ekukweva ayo mvura inopinda nawo kuti ifeme. Kudivi repamusoro, mwaranzi inogona kuchinja ruvara kuti iite sepasi pegungwa. Aya ndiwo maitiro avanozviita. Mwaranzi inodya hove, magakanje, starfish, urchins yemugungwa, hove, uye plankton.
Mwaranzi ihove dzecartilaginous. Skeleton yako haina kugadzirwa nemapfupa asi shwashwa. Semuenzaniso, isu tine cartilage mu auricles yedu. Kune mhuri makumi maviri nenhanhatu dzine marudzi anopfuura mazana matanhatu akasiyana emwaranzi. Stingrays ine huturu hunoruma kumagumo emuswe wadzo.
Inenge mwaranzi miduku yose inochochonya mukati memuviri waamai, iine mhuri imwe chete yemwaranzi inokandira mazai. The stingrays kubva imwe mhuri inonziwo stingrays. Vanokwapura spike yavo pamuviri uye nemumusoro, vachibaya vavengi vavo. Muchetura unobuda pakuruma.