Dinocroc

Dinocroc is the titular creature from a 2004 movie. Dinocroc is actually a hybrid between a prehistoric spinosaur known as Suchomimus and a modern day crocodile. There were originally two of them. Dr. Campbell (Bruce Weitz) uses Suchomimus DNA to create two hybrids between it and a modern day crocodile. One creature kills the other, Campbell's assistant and escapes. Its escape leads to a monster hunt, a news story, a cave filled with poison gas, a train crash and several dead people. Dinocroc is last seen walking away from the crashed train. Dinocroc and another Supergator (the original Supergator is dead) are being studied at Drake Industries Research Lab in Hawaii. They both escape. Dinocroc eventually kills Supergator and Dinocroc is killed in an explosion but not before one of them lays eggs. Whether these were Dinocroc's, Supergator's or both's is unknown.