The illustrated Bestiary of Creatures starting with the letter...

Asp Turtle

The Asp Turtle is a gigantic sea turtle that can be mistaken for a small island because of its colossal size. They are an ancient old creature where over the ages from the build up of mud and dirt, vegetation and trees grow upon its shell. On occasion it would submerge into the sea drowning any who have clambered on it, sometimes unknowingly by the Asp Turtle.