been setup a few years now
the prawns are fully tropical and they are fully contained
i think this is the species MACROBRACHIUM ROSENBERGII
and this is the maf requirements
the health standard is available here
http://www.biosecurity.govt.nz/imports/ ... ic.haw.htm
if the gill membranes are kept wet it can be awhile
but as soon as the memdranes are exposed to air they start to get damaged so time will vary
some types of fish will last longer