The main monster from the 2004 American monster movie, Dinocroc. The Dinocroc is a hybrid of a crocodile and a North African dinosaur related to it.
When a dinosaur that was related to the Crocodile was discovered in North Africa, scientist started to use it's DNA to create two hybrids. However, one of them escapes and starts going on a feeding frenzy. After multiple kills, the main characters lead it into a tunnel where they trapped it and gassed it to death. However, the Dinocroc was still alive. So when it chases two of them to a train track. When the train comes by, it hits the DInocroc, allowing one of the characters to stab in the eye with a pipe, seemingly killing it. However, at the end of the movie, the Dinocroc is revealed to still be alive.