This is a phenomenon in its own right, as it evolved in swordfishes/sailfishes, leptonectid ichthyosaurs like Eurhinosaurus, Protosphyraena (left), and thalattosaurs like Xinpusaurus (right).

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Drew 's Eurhinosaurus girl because woohoo! I do whatever I want!

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Eurhinosaurus girl - take a look at that snout!

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The coloration is based on recent data indicating countershading in ichthyosaurs, which while not surprising is still really cool. I mainly looked at modern dolphins for inspiration, as their skin is the closest analog.

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Highlights from the
Audoliceras, Dinictis, Eurhinosaurus, Pelagornis.

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