Grim is a Baryonyx of green complexion with red patches surrounding both eyes.
Grim was featured in the second season of Jurassic World: Camp Cretaceous, serving as a minor antagonist and leader of the Baryonyx trio.
For reasons unknown, Grim was abandoned at a medical station for an unspecified number of days, alongside a number of herbivores. Until, she was located by Darius, Brooklynn and Sammy in the episode The Art of Chill. Now facing a moral dilemma, Darius and Sammy argue if they should free Grim or let her die. However, the argument is cut short with the arrival of Grim's companions Chaos and Limbo, forcing the campers to retreat. In a desperate attempt to draw the carnivores away, Sammy releases the herbivores causing a brief diversion. At the last moments Darius uses the chaos as an opportunity to safely release Grim from her enclosure, allowing the Baryonyx trio to be successfully reunited.
Despite this, the Baryonyx trio (led by Grim) continue to pursue and track down the campers throughout the series. In Misguided Chaos, Grim and Limbo follow the group into a storage shed, but are briefly held back by an explosion devised to disorient the trio. The campers split of and the Baryonyx's led by Grim give chase after Brooklynn and Kenji accompanied by Hap on motorcycle. Unable to fend off the trio, Hap instructs the two to live a long life, selflessly jumping off the motorcycle to fend off the Baryonyx trio alone and is presumably killed.
Grim crosses paths with big game hunters Mitch and Tiff in Chaos Theory and attempts to ambush them. However, Grim is quickly dispatched and killed by a few shots from Tiffany's custom made rifle, who doesn't think twice before killing the Baryonyx. Her death was later avenged by her companions Chaos and Limbo, who promptly kill and devour Tiffany.
- After one of the raptors from The Lost World: Jurassic Park and Charlie, Grim is the third named dinosaur to be killed by a human.
- After The Big One, Charlie, Delta and Echo, Grim is the fifth named dinosaur to die in Jurassic Park franchise. Suceeding The Big One, Charlie, Delta and Echo respectively.