Baryonyx darwinii (name meaning "Darwin's heavy claw") is a species of large carnivorous non-avian theropod dinosaur which originally lived in the Barremian stage of the Early Cretaceous Period, about 130–125 million years ago, as Baryonyx walkeri, but has since been brought back from extinction by SciiFii and now lives in Prehistoric Wetlands located at Cretaceous Park in Sacramento, California. The average-sized specimens can grow to between 7.5 and 10 m (25 and 33 ft) long and weigh between 1.2 and 1.7 t (1.3 and 1.9 short tons). Baryonyx darwinii has a long, low, and narrow snout, which has been compared to that of a gharial. The tip of the snout expands to the sides in the shape of a rosette. Behind this, the upper jaw has a notch which that fits into the lower jaw (which curves upwards in the same area). It has a triangular crest on the top of its nasal bones. Baryonyx darwinii has a large number of finely serrated, conical teeth, with the largest teeth in front. The neck forms an S-shape, and the neural spines of its dorsal vertebrae increases in height from front to back. One elongated neural spine forms a hump along the centre of its back. It has robust forelimbs, with the eponymous first-finger claw measuring about 31 cm (12 in) long. It is a carnivore and mainly feeds on medium-sized-to-large fish, although it is known to scavenger on carcasses and even prey on animals as big as elephants. It catches and processes its prey primarily with its forelimbs and large claws. Baryonyx darwinii is semiaquatic, being known to live near riverbanks and can swim in a fashion similar to Spinosaurus.
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