Im sure it's possible. I once shipped a 37' blue whale next day ground. Worked out well. Now, speaking truthfully, I never shipped anything like that. However, Im sure a 7" hap would be no prob. I received 5-6" Flowerhorns before.
i just shipped a 10-11" zungaro from ny to ga it took 2 days shipped Tuesday got there thersday and arrived great i yoused 2 gallons of water and filled the bag with o2