Leatherback turtle belongs to larger turtles. When they are adults, their body length is about 2 meters, and the largest one can reach about 3 meters. The length of the carapace of leatherback turtle can reach about 1-1.5 meters, and its width is also between 56-90 cm, belonging to large turtles. They are larger and naturally heavier. An adult leatherback turtle weighs about 100-150 kg, and some well-developed leatherback turtles can weigh up to 200 kg.

Leatherback turtles live in the deep sea and are rarely seen under normal circumstances. Moreover, their body size is also affected by the environment. If they live in a comfortable environment, their body size will develop larger. If they live in a harsh environment, their development will deteriorate, and some may even endanger their lives.

The life span of leatherback turtles is relatively long, about 50-100 years. However, leatherback turtles in different growing environments have different lifespans. If it is a captive leatherback turtle, its life span will be shorter, about 50-60 years. If it is a wild leatherback turtle, its life span may be longer, and it can live to about 80 years, and some can live to 100 years.

However, there are many wild environments that are not suitable for their growth, so their life span will be relatively reduced. In addition, leatherback turtles have poor eyesight, and often eat plastic bags or other garbage floating in seawater as jellyfish, which causes intestinal blockage and eventually dies.