  Neutrinos may offer a unique opportunity to explore the far Universe at high
energy. The ANTARES collaboration aims at building a large undersea neutrino
detector able to observe astrophysical sources (AGNs, X-ray binary systems,
  ...) and to study particle physics topics (neutrino oscillation, ...). After
a description of the research opportunities of such a detector, a status report
of the experiment will be made.
