I know, but that isn't the main reason.
Steve Robinson from Baja Reef explained it to me.
First there is the bagging and boxing. That alone may take half a day. So some fish have already spent several hours in the bag before they even leave the facility. Then there is the wait for the government paperwork (local and US). Nothing can move before that arrives.
The next issue is the unpunctuality of the local airlines. Sometimes the boxes may sit for hours baking in the sun at the airport or they miss the connection flight in Australia or Fiji.
As soon as they made it there the worst is over, but there is still the half day flight to LA or San Francisco.
BTW my new ones came through Melbourne.
Steve also told me that he was involved in the collecting station in PNG and that the reason they had to close was the fact that they closed the nearby airport.