The Antares detector

The Antares Neutrino Telescope is the first operational Neutrino Telescope in the Mediterranean Sea. It has been completed in May 2008 and is meant to perform neutrino astronomy via a large three-dimensional array of photo-multiplier tubes. This note describes the design, the construction and the functioning of the telescope in the deep sea, offshore from Toulon in France, as well as the performances of the detector.