Eustreptospondylus

Eustreptospondylus was a carnivorous dinosaur from the late Jurassic Period (169-154 MYA). It was a theropod,a carnivorous dinosaur, a member of the Megalosauroidea superfamily and a relative to the famous Spinosaurus as well as Allosaurus and Giganotosaurus, which were also featured in Impossible Pictures productions.

Eustreptospondylus was shown to be an amphibious hunter, capable of swimming from island to island and hunt both on land and in the shadows.

A 5 m long predatory dinosaur that lived usually alone or in groups, Eustreptospondylus were primarily scavengers, combing the beaches for dead and dying animals; but for them, living on such small islands, they were always under pressure to find more carrion. When these dinosaurs come into confrontations, these dinosaurs did not risk injury and in the end, it was the loudest roar that won.

In Walking with... series
This fact was developed in the 3rd episode of WWD, where one Eustreptospondylus got snatched by a Liopleurodon. Later, two other Eustreptospondylus fight over a dead turtle. Another one attacks and devours some pterosaurs. A group of Eustreptospondylus that survive a storm eat a stranded Liopleurodon caught by the storm.

(Also, in the 5th season of Primeval a Eustreptospondylus (a "swimming theropod" ) is found on a nuclear submarine. It is later eaten by a pliosaur (Liopleurodon).)