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Estemmenosuchus sciifii (meaning "SciiFii's crowned crocodile" in Greek) is a species of large therapsid that originally lived during the Middle Permian around 267 million years ago as two extinct species, E. uralensis and E. mirabilis, and the genus itself was once extinct, but has since been brought back from extinction by SciiFii. This species is found in Paleozoic Park located in Downey, California, but there are many feral populations of Estemmenosuchus sciifii living in the wilderness throughout California, and the mystery of where did these Estemmenosuchus sciifii living in the wild came from, although some DNA testings suggests that they originated from some baby Estemmenosuchus sciifii that escaped from Paleozoic Park. Estemmenosuchus sciifii is characterised by the distinctive horn-like structures on its head, which are used for intra-specific display. It is an omnivore that primarily feeds on fruits, leaves, shrubs, twigs, roots, tubers, cycads, ferns, horsetails, insects, and carrion. It is a social her-dwelling animal that lives in herds of up to around 2-30 at a time.