Bag buddies, oxygen, lots of thick mil bags, and a big Styrofoam box. Overnight with insurance. Just like shipping a smaller fish,except on a larger scale. Cover all your bases and make sure everything is checked and rechecked ,so there are no surprises. Weight your box,water,bags, and everything beforehand. Then add 2-3 pounds for your fish. Get the outside dimensions of your Styrofoam box in inches as well. Then all you need to do is tell the usps or whoever you use those figures and the type of shipping you want(overnight) and the zip code where it's going to,and your set. Usually if you have the package there by 5,it gets delivered by noon the next day to its destination point.