The fossilized skin of the dragon has been confirmed as a warm-blooded animal

fossils confirmed to be warm-blooded animals. Photo Source: Nature: Although
is called a fish, it may not be a fish and is not "cold-blooded".
, a paper published online in Nature describes the skin fossils of the dragon, which retain the dermatation, skin, off-cort fat and color. This is the first reported fossil of dragon fat, meaning that the dragon is a warm-blooded reptile.
is an extinct sea reptile, shaped like a modern toothed whale, such as a dolphin. Their similar shape means that dragons and whales evolved into similar strategies for adapting to marine life, which is one example of convergence evolution. The dragon has long been suspected of being a warm-blooded animal, but this has been difficult to verify due to the limited fossils.
Johan Lindgren of Lund University in Sweden and colleagues studied the skin tissue composition of a well-preserved sample of the narrow-winged dragon genus, which is about 180 million years old. They found the original smooth skin residue of the dragon. Its skin is still elastic and consists of dermatical, skin and off-cortical fat.
is a feature of modern marine mammals, which protect against the cold and help float, equivalent to a fat bank. Researchers say this is the first time fossils of fish and dragon fat have been identified, confirming that the dragon is a warm-blooded animal.
researchers also found that the color pattern of the dragon's skin indicated that the dragon had an "anti-shadow", i.e. a lighter color on the lower abdomen and a darker color on the upper surface. This coloring pattern can be seen in many modern marine mammals and is used to disguise, resist ultraviolet light and regulate heat. (Source: Lu Yi, China Science Daily)