Tirtouga is a reptilian Pokémon that resembles a sea turtle. Its body is mainly deep blue, and it bears a black/blue shell on its back. 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 "tortuga" meaning "turtle" in Spanish, and possibly "dirt" due to its partial ground typing. Also there is a chance its name comes from "Tartaruga" which is Italian for turtle.