  The ANTARES Collaboration is aiming at the construction and the operation of
a large undersea neutrino telescope for neutrino astronomy, neutrino
oscillation and indirect dark matter searches. Started 3 years ago an intensive
R&D program has shown the feasibility of such a detector in the deep waters of
the Mediterranean sea. We have now started the design and the construction of a
0.1 km(^{2}) detector for which the expected performance will be briefly
described here.
