Order Sirenia
![](images/mtm_slideshows/1751305264_f20c4fba33_b.jpg)
DugongFamily:Dugongidae
Photo: .m for matthijs@flickr.com License: Creative Commons attrib/noncom/noderiv
![](images/mtm_slideshows/1725262036_379ef322af_b.jpg)
DugongFamily:Dugongidae
Photo: .m for matthijs@flickr.com License: Creative Commons attrib/noncom/noderiv
![](images/mtm_slideshows/2159190948_d63b615f10_o.jpg)
DugongFamily:Dugongidae
Photo: huggy47@flickr.com License: Creative Commons attrib/noncom/noderiv
![](images/mtm_slideshows/1221194762_7d0fc41e5d_b.jpg)
ManateeFamily:Trichechidae
Photo: ilovepics11@flickr.com License: Creative Commons attrib/noncom/noderiv
![](images/mtm_slideshows/263491314_f16eb363a3_b.jpg)
ManateeFamily:Trichechidae
Photo: Sophro@flickr.com License: Creative Commons attrib/noncom/sharealike
![](images/mtm_slideshows/829906779_c8cfc0a156_o.jpg)
ManateeFamily:Trichechidae
Photo: mattb_tv@flickr.com License: Creative Commons attrib/noncom/noderiv
2 Families, 5 Species
Manatees, Dugong
Coastal waters of tropical and subtropical oceans
Paddle–like forelimbs, herbivorous
140 to 1,000 kg.