Mud Crawler

Mud crawlers are vicious carnivorous Rahi found in Po-Wahi. They have large and have acidic tongues, useful for capturing their prey. Nuparu (who once dangled over a hole full of them) said that they have a breath that smells like a Tarakava that's been out in the sun too long.

Links
https://toaheroes.wordpress.com/2008/11/08/m-onstrous-rahi/