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Tetra is the name of many species of freshwater fish in the family Characidae from Africa, Central America and South America.

Tetra may also refer to:

Arts and entertainment

• Tetra (album) (stylised as Tetr4), the first album from the French break-beat band C2C
• Tetra, an alias for Princess Zelda in The Legend of Zelda: The Wind Waker and The Legend of Zelda: Phantom Hourglass
• Tetra Galaxy, the fictional galaxy in the game Metroid Prime Hunters

Businesses

• Tetra (company), a supplier of aquarium equipment and fish food
• Tetra Pak, a multinational food packaging and processing company of Swedish origin
• Tetra Tech, an environmental engineering and resource management firm

Science and technology

• Terrestrial Trunked Radio (TETRA), a standard for encrypted radio networks
• Tetra (mite), a genus of mites in the family Eriophyidae
• Tetra (monkey), a rhesus macaque that was the first successfully birthed primate created via an artificial cloning technique
• Tetra (unit), a proposed unit of information by Donald Knuth denoting 32 bits
• Mitsubishi TETRA, a concept car first exhibited in 1997

Other uses

• Tetra-, a numeral prefix for 4
  • Tetraphobia, the practice of avoiding instances of the digit 4
• Tetraplegia, shortened to tetra, dysfunction or loss of motor and/or sensory function of the spinal cord

See also

• All pages with titles beginning with Tetra
• Humbert Tétras, a French ultralight aircraft

• Disambiguation pages