Leatherback

Leatherback sea turtle, Lute turtle, Leathery turtle Dermochelys coriacea (Vandelli, 1761)

The Leatherback Sea Turtle is the largest of all sea turtle species. It lacks a hard carapace (shell); instead, its shell (or back) is generally characterized by five prominent, raised ridges (or keels) running lengthwise. The head and limbs are also devoid of scales. The entire body is encased in leathery skin. Its body color is typically dark gray with white or pink spots scattered over its entire body. Significantly, the pink spot pattern on the top of each leatherback's head is unique to every individual, which allows it to be used for identifying different individuals.

The Leatherback Sea Turtle is the sea turtle with the greatest diving capability. The current recorded maximum depth it can dive to is 1,280 meters, and it can hold its breath for up to 86 minutes. The leatherback is also the most widely distributed sea turtle species, found across the globe. Its presence is widely recorded in tropical, subtropical, and temperate waters worldwide.

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It is classified as VU (Vulnerable) on the IUCN Red List of Threatened Species.
In Taiwan, it is currently protected under the Wildlife Conservation Act and is listed as a Class I Endangered Species.
 
The information above is cited from "One Hundred Species of Marine Animals in Taiwan".