Alex Mustard / Dugong (Dugong dugon) male and juvenile Golden trevally (Gnathanodon speciosus) swimming over Seagrass (Halophila stipulacea) meadow. Marsa Nabaa, Marsa Alam, Egypt.

Doug Perrine / Dugong or Sea cow (Dugong dugon) split level view, Calauit Island, off Busuanga, Calamian Islands, Palawan, Philippines.

Juergen Freund / Dugong (Dugong dugon) in the seagrass bed shadowed by a trevally. Dimakya Island, Palawan, Philippines

Juergen Freund / Dugong (Dugong dugon) surfacing to take a breath of air. Dimakya Island, Palawan, Philippines.

Juergen Freund / Diver watching a swimming Dugong (Dugong dugon). Dimakya Island, Palawan, Philippines, April 2010.

Juergen Freund / Dugong (Dugong dugon) feeding in the seagrass bed with trevally fish inspecting the disturbed sand. Dimakya Island, Palawan, Philippines

Mike Parry / Dugong (Dugong dugon), Lamen Bay, Epi Island, Vanuatu

Juergen Freund / Dugong grazing on sea grass {Dugong dugon} Indo Pacific

Juergen Freund / Dugong grazing on sea grass {Dugong dugon} Indo Pacific

Doug Perrine / Dugong or Sea cow (Dugong dugon) with a Remora (Echeneis naucrates) attached to its underside, Calauit Island, off Busuanga, Calamian Islands, Palawan, Philippines.

Doug Perrine / Dugong or Sea cow (Dugong dugon) male feeding on Seagrass, Calauit Island, off Busuanga, Calamian Islands, Palawan, Philippines.

Doug Perrine / Dugong or Sea cow (Dugong dugon) male feeding on Seagrass, Calauit Island, off Busuanga, Calamian Islands, Palawan, Philippines.