'Reptiles' including dinosaurs and birds.
Chelonia mydas, 'Green Turtle'. Widespread throughout the world's tropical and warm temperate seas.
The 'true sea snakes' are purely marine animals, they can't crawl on land and are quite floppy when picked up (although you probably shouldn't pick them up). This distinguishes them from the 'Sea Kraits', usually classified in the different Subfamily Laticaudinae, which are slightly more amphibious and can crawl up on land to rest and digest.
Sea Snakes are mostly found across the tropical Indo-Pacific ocean. In my experience, they seem more common in the continental shelf waters in the Arafura and Timor seas off northern Australia. They are best seen on calm days when the water surface is slick and smooth. But you may have to wait for many hours on the deck of a ship to see one. But it is worth it to see something most people have never seen!
This order includes birds are the more common above the colder more nutrient-rich southern oceans, such as Albatross and the petrels.
Ardenna pacifica, 'Wedge-tailed Shearwater', 'Muttonbird'. One of the more commonly seen and widespread of the shearwaters, being seen across tropical seas.
Onychoprion anaethetus, 'Bridled Tern'.
This order only contains one family.
Phaethon lepturus, 'White-tailed Tropicbird'.
'White-tailed Tropicbird' in the surface of the water.
Fregata magnificens, 'Magnificent Frigatebird'. Found around South and Central American ocean waters.
Stenella longirostris, 'Spinner Dolphin'. This species probably includes many species; as the very least there are many distinct forms around the world. In the middle of the Pacific Ocean, far away from land, I have seen very tiny forms of Spinner Dolphins.
The 'Bottlenose Dophin' is now usually considered to be three or even four different species. Two occur across larger areas of the tropics, with the larger 'Common Bottlenose' Tursiops truncatus, being more widespread and also found in deeper more open water. The closer they examine these two species, the less closely related they seem to be.
Tursiops aduncus, 'Inshore (Indo-Pacific) Bottlenose Dolphin'. Usually found in coastal waters, around the Indo-Pacific oceans.
Megaptera novaeangliae, 'Humpback Whale'.
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