The name "terrapin" is unambiguously applied to the diamondback terrapin, Malaclemys terrapin, in both British English and American English; the name originally being used by early European settlers in North America to describe these brackish water reptiles that inhabited neither freshwater habitats nor the sea. However, in American English the name is not routinely applied to other semi-aquatic or freshwater turtles, unlike the situation in British English where any such turtle might be called a terrapin. A terrapin is the mascot of the University of Maryland and Tampa Preparatory School.
The Grateful Dead's 1977 album Terrapin Station features two dancing terrapins on the cover of the album . The terrapin has become an iconic symbol of The Grateful Dead, and a recognizable emblem among their fans.
The Terrapin is also the mascot for University of Maryland. Often acknowledge as a "Terp".
In 2000, the British electric music artist Bonobo released the single "Terrapin" on his third cd entitled Animal Magic.
The popular children's show The Wonder Pets features a terrapin as Turtle Tuck, one of the super-pets.
In the animated film The Swan Princess, the character Speed is a terrapin.