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Total length 1.4-1.7 m.
One of the smaller cetaceans. The only true porpoise with no dorsal fin. In its place a series of tubercles runs down the back. Body colour is pale grey with a blue tinge on the back and sides, with off-white ventral regions. (The body colour only becomes black after death.) Tail flukes have slightly rounded tips and a well-defined notch. Flippers are long, broad and pointed at the tips. Tooth counts range from 13 to 22 pairs in each jaw.
ระบบนิเวศ :
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Along shores, mainly Gulf of Thailand.
รายละเอียดอื่นๆ ของแหล่งที่พบ :
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Trang (Chaomai Beach); Ranong; Bangkok; Songkhla; Phangnga; Chon Buri (Bang Saen, Bang Sarae, Koh Si Chang, Naklua); Prachuap Khirikhan; Pattani (Thepa); Trat (Trat and Laem Ngop Districts); Chantaburi (Laem Sing District); Chumphon (Khanduli, Tha Chana Bay).