The most famous tongue in the world which belongs to one of the most colorful animals in the world: the chameleon. In relation to their body size, it’s the longest tongue in the world. It’s twice as long as the animal itself, including its tail. Within a fraction of a second, it’s flung towards prey like a rubber band. The insect is stuck and the chameleon just has to “reel it in”

While other animals like the giraffe, anteater, pangolin and sun bear have longer tongues, their tongues aren't up to twice the length of their body.

The chameleon's tongue can be up to 120 cm (47.2 in) in a 60 cm (23.9 in) body

More Info: en.wikipedia.org