Quote Originally Posted by Arimel View Post
My knowledge of a Tarasque comes from DND 3.5. It is a huge land creature and only 1 is known to exist. It destroys entire worlds. However, I dont quite think this is what is being referenced here though...
The D&D Tarasque is very loosely (as is usual with D&D) based on an actual legendary creature. It is a monster of Provence. http://folklore-society.com/miscellany/tarasque Making it a sea creature seems perfectly fitting with the lore. There's even a dinosaur named after the Tarasque, https://en.wikipedia.org/wiki/Tarascosaurus.