Minecarp

The Minecarp is a Minecart variant that is used for fast travel on Minecart Tracks through water. On non-submerged tracks, it has a max speed of 66 MPH (same as a standard iron minecart).

It is a quest reward from the Angler.

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.