The American television adaptation of the Dragons' Den business format is called Shark Tank.
Shark Tank premiered in the United States in 2009 and features entrepreneurs presenting businesses to a panel of investors. The investors, known as sharks, can offer money in exchange for equity or other terms, creating the same central negotiation that defines Dragons' Den.
The American programme is part of an international format lineage that began with Japan's Money Tigers and was adapted for different countries. The names and panel members vary by territory, even though the pitch structure is recognisable.
Shark Tank is not simply another title for the British show. It is the United States version, while Dragons' Den remains the title used in Britain and several other markets. The two programmes have separate casts and production histories.