The plankton and benthic macrofauna in relation to the open sea cage culture of Lates calcarifer during the period from
October 2008 to March 2009 off Munambam near Cochin were studied. The cage site and a reference site were selected for
simultaneous sampling. During the study, the cage culture activity was not found to influence the plankton population but
there is an indication of its influence on the benthic macrofauna