Genetic Nightmares is a manga/ comic series I'm doing. The Kahmelian is one of the deadliest creatures in the Genetic Nightmares universe.
It isn't fast. but it doesn't need to be. It has a launching sticky tongue that can catch smaller prey. It's superb camouflage and colour changing abilities makes it next to impossible to see. It's bite is horrific thanks to the lower jaw being retractable, and an inner upper jaw that comes and and retracts as well. In just one bite a large animal would be in shock.
At 50 ft long, the Kahmelian is the ultimate ambush predator.