We are using the Multibeam 21cm receiver on the Parkes Telescope combined with the optical Two degree Field spectrograph ( 2dF ) of the Anglo-Australian Telescope to obtain the first complete spectroscopic sample of the Fornax cluster .

In the optical the survey is unique in that all objects ( both “ stars ” and “ galaxies ” ) within our magnitude limits ( 16.5 \leq B _ { J } \leq 19.7 ) are measured , producing the most complete survey of cluster members irrespective of surface brightness .
We have detected two new classes of high surface brightness dwarf galaxy in the cluster .
With 2dF we have discovered a population of very low luminosity ( M _ { B } \approx - 12 ) objects which are unresolved from the ground and may be the stripped nuclei of dwarf galaxies ; they are unlike any known galaxies .
In a survey of the brighter ( 16.5 \leq B _ { J } \leq 18 ) galaxies with the FLAIR-II spectrograph we have found a number of new high surface brightness dwarf galaxies and show that the fraction of star-forming dwarf galaxies in the cluster is about 30 % , about twice that implied by earlier morphological classifications .

Our radio observations have greatly improved upon the sensitivity of the standard Multibeam survey by using a new “ basket weave ” scanning pattern .
Our initial analysis shows that we are detecting new cluster members with HI masses of order 10 ^ { 8 } M _ { \odot } and HI mass-to-light ratios of 1–2 M _ { \odot } /L _ { \odot } .