Tetra (disambiguation)
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Tetra is any of several species of freshwater fish in the family Characidae from Africa, Central America and South America.
Tetra may also refer to:
- Tetra-, a numerical prefix that refers to four
- Tetra (company), a supplier of aquarium equipment and fish food
- Terrestrial Trunked Radio (TETRA), a standard for encrypted radio networks
- Tetra (monkey), a rhesus macaque that was the first successfully-birthed primate created via an artificial cloning technique
- 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
- Mitsubishi TETRA, a concept car
- Tetra Pak, a multinational food processing and packaging company of Swedish origin
- Quadriplegia is also known as tetraplegia, shortened to tetra
- Tetra Tech, an environmental engineering and resource management firm
- Tetra (album) (stylised as Tetr4), the first album from the French break-beat band C2C
- tetra (unit), a proposed unit of information by Donald Knuth denoting 32 bit
- Humbert Tétras, a French ultralight aircraft