  The experimentally predicted existence of a proton halo in $^8$B is confirmed
by dynamical microscopic multiconfiguration cluster model calculations. The
thickness of the proton halo in $^8$B is 0.5 $fm$ while in $^8$Li a 0.4 $fm$
thick neutron halo has been found. It is shown that the huge quadrupole moment
of $^8$B partly comes from the very distortable $^7$Be core.
