Dugong

**Definition:** A genus of the order Sirenia characterized by a notched tail, the presence of nasal bones and a long nasal cavity, and large columnar teeth lacking enamel. Dugongs inhabit the coastal waters of the Indian Ocean, Red Sea, and the Malay Archipelago. (From Scott, Concise Encyclopedia Biology, 1996)

**Tree numbers:** - B01.050.150.900.649.313.250.750.125

**Synonyms:** - Dugongs