You know the Pokemon Goodra? They're based on the same thing - the lou carcolh, a French serpent-snail hybird. They're said to have tentacles around their mouth that stretch for miles to ensnare prey from their caves. I probably pronounce "lou carcolh" wrong.
I ended up giving it a mostly snake body, with the stalks & shell of a snail. I decided against the mouth tentacles because I ended up liking the snake head with the long tongue (it has a stretchy tongue instead.) I gave it arms just to make it more anthropomorphic. I like it's design overall. I might add little conical horns between the stalks.
It coincides with the "fire salamander" in the same "bootleg Mon" idea I had in mind.