This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Chukwa (Hindu)
In Hindu mythology, Chukwa is the first and oldest turtle, supporting the Earth. In some accounts, she supports the elephant, Maha-pudma, who supports the Earth. She is depicted lying on her back with the world is upside down in many drawings, showing that the earth will forever be under Chukwa.
Chukwa is a sea turtle of gigantic proportions, being about the size of a small island such as Little Garden. Comparatively to the rest of her body, her head is quite small, possessing a sharp-toothed maw and tiny eyes. Chukwa's carapace is quite spiky, with numerous peaks and steep rock formations protruding from her skull, making the area rather mountainous.