Minecarp

The Minecarp is a Pre-Hardmode Minecart that is a quest reward from the Angler, and is used for fast travel on Minecart Tracks through water. On non-submerged tracks, like the normal Minecart, the top speed of the Minecarp is 66 mph.

Trivia

 * The name is a portmanteau, combining the words Minecart and Carp.
 * Carp are various species of oily freshwater fish. They are native to Europe and Asia.
 * The Minecarp is the first and only Minecart reward from completing quests from the Angler.
 * The cart resembles a fish, presumably a carp, hence it's name.