Tirtouga is extremely similar to a sea turtle, bearing a black/blue shell. Its skin is lighter blue, with its face covered in a marking that is the same color as its shell. It has more of these markings in the middle of its fins.
The name "Tirtouga" may be based on the words "turtle" and the Caribbean island of Tortuga or maybe the word "Tortuga" meaning turtle in Spanish. Also there is a chance its name comes from "Tartaruga" which is Italian for turtle.