Mysticeti Odontoceti Archaeoceti (khu̍t指)
Cetacea ("Tōa hái-koài") 這 (chit)个 (ê)ba̍k是 (sī)包括 (pau-koah)海翁 (hái-ang)佮 (kap)海豬 (hái-ti)在內 (chāi-lāi)的 (ê)水棲 (chúi-chhe)市奶類 (chhī-leng-lūi),有 (ū)80外的 (goā-ê)種 (chéng),分做 (pun-chò)2个a-ba̍k: Mysticeti (鬚鯨 (chhiu-keng)) 佮Odontoceti (齒鯨 (khí-keng),包括海豬仔 (hái-ti-á))。
怹 (In)是適應 (sek-èng)水底 (chúi-té)生活 (seng-oa̍h)上 (siōng)徹底 (thiat-té)的飼奶 (chhī-leng)動物 (tōng-bu̍t)。怹的身軀 (sin-khu)是流線型的 (liû-soàⁿ-hêng--ê),外皮 (goā-phoê)光滑 (kng-ku̍t),強 (kiông)欲 (beh)無 (bô)毛 (mo͘),下底 (ē-té)厚 (kāu)間垃 (keng-lâ) (blubber),通 (thang)寶蘊 (pó-un)。從 (Chêng)2車 (ki) "手 (chhiú)" 柄 (pìⁿ)會得 (ē-tit)掰 (poé)水 (chúi)的實 (si̍t),後 (āu)2支 (ki) "跤 (kha)" 藏 (chhàng)佇 (tī)體內 (thé-lāi),也 (iā)已經 (í-keng)退化 (thoè-hoà)無路用 (lō͘-iōng)。尾差 (Boé-chhe)是坦橫的 (thán-hoâiⁿ--ê)。