Carracosta is an ancient-looking reptilian Pokémon that resembles a large sea turtle. Its body is dark blue and light blue, and it has a giant black rocky shell on its back. It also has a scaly black covering over its face and a very small tail. It has three oval-shaped, claw shaped markings on each of its front flippers and it has two toed feet bearing nails colored the same as its front appendages.
Carracosta is the evolved form of Tirtouga at level 37.
Carracosta appears to be based on a sea turtle.
It could be possible that Carracosta was based from the Daiei's kaiju monster Gamera, similar to how Tyranitar was based from Toho's kaiju monster Godzilla.
Carracosta's English name seems to be derived from "carapace" and "costa" (Latin, Spanish, and Portuguese for coast).