Umchazalwandle yisigaba solwazi esiphathelene nokuhlaziya nokuqonda ulwandle nezilwane ezihlala kulona. NgesiNgisi kuthiwa yi-"oceanography". OsoLwazi bomchazalwandle bacwaniga ulwandle nendalo yalo ukuze singaba nolwazi lokuluvikelela uguquko lwesimo sezulu, phecelezi ulaka lwemvelo. Kuwo wona umchazalwandle sifuna ngezinto ezifana nalezi: Amagagasi - ("waves") Amabuya - ("tides") uMuyambi woMangijani - ("coral reef") isiThiyo somGoqo - ("barrier bar") isiThiyo sesiQhingi - ("barrier island") umGuba - ("bay") umGoqo womGuba - ("baymouth bar") uThungulu - ("beach") uThungulu oluphakeme - ("raised beach") iziDlanzi zoThungulu - ("raised cusps") uGema loThungulu - ("beach ridge") isiQhingi - ("island") umGede wolwandle ("sea cave")