Concavenator is a recently discovered theropod that lived 130 million years ago in what is now Spain during the Early Cretaceous Period. It was one of the top predators in it's ecosystem, and was certainly wierd looking. Above it's hip was a fin-like hump. This hump could have been more slender like the sails of later dinosaurs like Baryonyx and Spinosaurus. In this case, it would have been used for display, or to regulate body temperature. One of the scientists involved in this dinosaurs discovery, Fransico Ortega, says it is "most plausible" that the hump was more fleshy, and stored fat, like a modern day Zebu, or Camel. Another interesting feature are the "quills" that these dinosaurs have on their arms. Impresions of this dinosaurs skin was found in it's fossils, and it looks like the skin of modern day crocidiles. It was 6 metres long and 2.5 metres tall. It was 2 tons in weight. It was a carnivore, that ate small to medium sized dinosaurs.