Earth Crawlers「アースクローラー」 are massive creatures that can be seen in various locations. Premature ones are called Sand Crawlers「サンドクローラー Sandokurōrā」.
Sand crawlers are chubby, fish-like creatures with teeth and jaws, and dark artistic backs. They are around the size of Hawk. As they mature, they are more crocodile-like and can span hundreds of feet in length.
They can dig underground and catch their prey from below, eating anything they could fit in their mouths. Matured ones are able to eat big things like giants, buildings, and Tyrant Dragons. They coat themselves in mucus to moisturize their skin and to protect against physical attacks.