In this paper we present new AAOmega spectroscopy of 254 galaxies within a 30 \arcmin radius around Abell 3888 .
We combine these data with the existing redshifts measured in a one degree radius around the cluster and performed a substructure analysis .
We confirm 71 member galaxies within the core of A3888 and determine a new average redshift and velocity dispersion for the cluster of 0.1535 \pm 0.0009 and 1181 \pm 197 km/s , respectively .
The cluster is elongated along an East-West axis and we find the core is bimodal along this axis with two sub-groups of 26 and 41 members detected .
Our results suggest that A3888 is a merging system putting to rest the previous conjecture about the morphological status of the cluster derived from X-ray observations .
In addition to the results on A3888 we also present six newly detected galaxy over-densities in the field , three of which we classify as new galaxy clusters .