  Our previous studies of the ultracompact galaxy group CG J1720-67.8 have
revealed properties, which suggest that the group is in a very advanced
evolutionary state. We present here new observations in the radio and optical
regimes, which have been obtained in order to further investigate the dynamical
and evolutionary state of the group. Velocity fields reconstructed from
integral field spectra of two regions of the group, obtained with SPIRAL at the
Anglo-Australian Telescope (AAT), show some degree of distortion and a
considerable velocity gradient across one of the TDG candidates. Estimates of
the HI content and of the overall star formation rate of the group are obtained
from radio observations with the Australia Telescope Compact Array (ATCA) in
the 21 cm line and in the 20 cm continuum.
