Perhaps this is the new genetically created Dinosaurs he spoke of in an interview with /Film:
“Yes, there will be one new dinosaur created by the park’s geneticists. The gaps in her sequence were filled with DNA from other species, much like the genome in the first film was completed with frog DNA. This creation exists to fulfill a corporate mandate—they want something bigger, louder, with more teeth. And that’s what they get.
I know the idea of a modified dinosaur put a lot of fans on red alert, and I understand it. But we aren’t doing anything here that Crichton didn’t suggest in his novels. This animal is not a mutant freak. It doesn’t have a snake’s head or octopus tentacles. It’s a dinosaur, created in the same way the others were, but now the genetics have gone to the next level. For me, it’s a natural evolution of the technology introduced in the first film. Maybe it sounds crazy, but most of my favorite movies sound crazy when you describe them in a single sentence.”