Sigilmassasaurus brevicollis is a theropod dinosaur from the early Late Cretaceous of Morocco,Closely related to the second tribe of the famous, Spinosaurus, Spinosaurus Morrocanus. For surprise it represents its own family, called the Sigilmassasauridae or Sigimassaurids. At first when Stromer,the same palaeologist to discover the Spinosaurus, found this skeleton lying in Savasana in the river system called the Kem Kem river system, he first related it to the Carchaodontosaurids like the Giganotosaurus, Carcharodontosaurus and Mapusaurus, and later when he realised and studied the Vertebrae and the head, he extracted the dinosaur to the Spinosaurids like Spinosaurus, Suchomimus, Baryonyx and Icthyovenator. As it’s relatives, Spinosaurus, Suchomimus, Baryonyx and Icthyovenator, it ate fish that it hunted from the river (Kem-Kem). It wasn’t easy to hunt fishes, You will need specialized teeth and strong, flexible, reflective neck plus the Crocodillians like the Sarcosuchuses, could attack anytime. But as it stayed near the Spinosaurus it had an advantage, that the giant Crocs would’nt even dare to come near the Spinosaurus.