Passage: Ruwa mai gishiri yana rufe kusan kilomita 361,000,000 (139,000,000 sq mi) kuma an saba raba shi zuwa manyan tekuna da ƙananan tekuna, tare da teku da ke rufe kusan kashi 71% na farfajiyar Duniya da kashi 90% na yanayin halittu na Duniya. Tekun yana dauke da kashi 97% na ruwan Duniya, kuma masana kimiyyar teku sun bayyana cewa kasa da kashi 5% na Tekun Duniya an bincika. Jimlar girman kusan kilomita 1.35 ne (320 miliyan cubic mi) tare da matsakaicin zurfin kusan mita 3,700 (12,100 ft).Tun da tekun duniya shine babban ɓangaren hydrosphere na Duniya, yana da mahimmanci ga rayuwa, yana zama wani ɓangare na sake zagayowar carbon, kuma yana tasiri yanayi da yanayin yanayi. Tekun Duniya shine sanannen mazaunin nau'in halittu 230,000, amma saboda ba a bincika shi ba, yawan jinsunan da ke cikin tekun da ke cikin teku ya fi girma, wataƙila sama da miliyan biyu.
Kashi 71 cikin dari