Vegetarianism arose three times in extinct crocodiles. Maybe six.

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American alligator/© Mark Kostich, Adobe Stock

From ScienceDaily:

Based on careful study of fossilized teeth, scientists have found that multiple ancient groups of crocodyliforms — the group including living and extinct relatives of crocodiles and alligators — were not the carnivores we know today. Evidence suggests that a veggie diet arose in the distant cousins of modern crocodylians at least three times.

We’ll leave it to a reader to draw a conclusion about that.