Neospinosaurus

The sea tiamat (Neospinosaurus marinus), also known as the marine tiamat, is a species of spinosaurid that originally did not exist, but has since been created by SciiFii and introduced throughout the world's coastlines to help boost biodiversity. The sea tiamat is among the largest of all known terrestrial carnivorous dinosaurs, nearly as large as or, in some cases, even larger than Tyrannosaurus, Giganotosaurus and Carcharodontosaurus. The sea tiamat can reach lengths of 15–16 metres (49–52 feet) and can weigh around 6.4–7.5 tonnes (7.1–8.3 short tons), despite its body design and size, it is still able to stand and walk on its back legs. The skull of the sea tiamat is long and narrow, similar to that of a native modern crocodilian. Despite its gigantic size, the sea tiamat does not hunt living land animals, instead it is known feed on fish, but can sometimes feed on carrion to supplement its diet; it lives both on land and in water as a native modern crocodilian does. The sea tiamat has a more fin-like tail than Spinosaurus, allowing it to more effectively swim in the water, and has more flipper like feet and hands to paddle and steer through the water. The distinctive spines of the sea tiamat, which are long extensions of the vertebrae, growing to at least 1.65 meters (5.4 ft) long and have skin connecting them, forming a sail-like structure. The sail-like structure on sea tiamat has multiple functions, including thermoregulation and display. Unlike Spinosaurus, the sea tiamat tolerates both brackish waters and pure seawater, thanks to its glands similar to those of sea turtles to help remove excess salt from its body. The conservation status of the sea tiamat is Least Concern due to successful conservation efforts and the sea tiamat's wide range.