Each country has a different set of rules for export along with the fact that different pikes ship better at different sizes. A dwarf is better when grown, so, you need to get them as sub-adult (for the most part) fish, only found later in the season. In the case of most of the larger (lugubris types) you want juvies to ship (2"-4") they would need to be collected earlier in the season. My $0.02, still learning the ins and outs of the import biz on cichlids 