Shark Tank is the title of the American television adaptation of the format behind British Dragons' Den.
The US programme features entrepreneurs pitching businesses to wealthy investors, who may offer money in exchange for an ownership stake. The investors are called sharks rather than dragons, creating the American title and its central branding.
Both programmes ultimately trace their format lineage to the Japanese business-pitch show Money Tigers. The British and American versions are therefore related adaptations, not the same programme with a different title. They also have different presenters, investors and broadcasting histories.
Shark Tank premiered in the United States in 2009. The programme is often confused with Dragons' Den because the pitch structure is similar, but the investor nickname and title are specific to the American version.