Can you be more specific?
What do you mean by help?
Shipping fish is the same everywhere.
Get a styrofoam box, enough plastic bags, rubber bands, and fill bags about half air and enough water to cover the fish, maybe some heat packs.
If the fish have spines on fins etc, I wrap the entire bag in duct tape to prevent leaks.
Pick a shipper....Fed-X, UPS, or even the US post office.
But in theory they all use the same planes, so its mostly about cost.
Check weather where you are, and where they are going, and any hub they might stop.
Starve fish for a couple days before shipping so their waste doesn't foul the bags, and in case of a flight delay.
If you use the USPS, and pick a time limit, (I have always used 24hour shipping for fish, no longer).... with USPO if it arrives late, you can be reimbursed for the cost of shipping, as far as I know, the other shippers don't providee that guarantee (but things can change).
Small fish usually ship better than large ones (I always add a few extras), and are less water weight so less expensive, a box of a few small fish usually cost about $50 using USPS.