He states on his website they wrap the rock in saltwater soaked wrapping, them bubble wrap before putting into the styro box. So, the bacteria and coralline might be okay but, any other hitchhikers (like crabs, snails, etc) are unlikely to make it. I'm surprised he doesn't have options for overnight or priority shipping.Unfortunately I also ordered 10lb of Australian live rocks from addictivereefkeeping
And apparently (despite the high cost) they ship them via UPS ground (7days probably) so I think they will not live anymore when they reach me in Boston