Which 1970 Plymouth model is named after a type of fish?

The 1970 Plymouth model named after a type of fish was the Barracuda. Its name refers to the barracuda, a fast, predatory saltwater fish, and Plymouth used the name throughout the car’s 1964–1974 production run.

The 1970 Barracuda was a completely redesigned third-generation model. It moved away from its earlier Valiant-based roots and used Chrysler’s new E-body platform, shared with the Dodge Challenger. The redesign produced a shorter, wider, more aggressive car offered as a coupe or convertible; the earlier fastback body style was discontinued.

High-performance versions included the 'Cuda, which could be equipped with powerful Chrysler V8s, including the 426 Hemi. The Hemi 'Cuda convertibles became especially rare and valuable because only a tiny number were built.

The name is sometimes shortened to “Cuda,” but that nickname identifies a performance-oriented Barracuda variant rather than a different fish-named Plymouth model. GTX, Road Runner, and Superbird are separate Plymouth nameplates with no fish-based name.