A Parasite that Becomes the Host’s Tongue
A parasitic louse that crawls into its hosts mouth, vaporizes its tongue, then clamps itself onto the withered stub so it can ride around inside its hosts mouth and drinks its mucus for the rest of their mutual lives. Once the louse is latched onto the muscle, the host uses its body as a tongue instead.
The process is a symbiotic relationship which entails a long-term interaction between two or more different biological species for survival purposes.
I have to draw that