A root-tail is one of the kreatures of Fractalia. This awesome picture was drawn by Rose, age 11.

A root-tail can use its mouth to eat but it can also force its muscular tail into the ground and take up nutrition like a plant does. It will sit there for days sleeping while its tail takes in nutrition from the soil.

You don't want to wake up a root-tail when its tail is in the ground. It gets very angry, rips its tail from the ground, and chases after you. It leaves a huge hole in the ground so be careful not to fall in.