How to reach Okinawa Aquarium with Ferry

Hello
I'm going to visit Japan for the 1st time towards the end of this month. I (and my friends) am considering to visit the Aquarium of Okinawa. I've read from the official site, and around the web, only infos about reaching the aquarium from Naha's airport. But I've seen that the flight prices from Kagoshima are pretty expensive, so I started looking for some Ferry solution infos:
price and departures/arrives times/landing places. Do you have any infos about it?
thanks very much in advance!

There are daily boats from Naha Port to Motobu Port, from where it is still a few kilometers to the aquarium.

I just checked the Marix webpage (in Japanese)

http://www.marix-line.co.jp/index.htm

It looks like the lowest fare from Kagoshima to Motobu is 26,600 yen leaving Kagoshima at 6:00 PM arriving Motobu at 4:30 PM the next day. That's a one-way price.

On the other hand, you could use the Yokoso

http://www.japan-guide.com/e/e2364.html

and get a round trip airfare to Naha for the price of a one-way ferry ride. If you time your arrival right, you can catch a ferry to Motobu for about 2500 yen from Naha port.

It looks like the lowest fare from Kagoshima to Motobu is 26,600 yen leaving Kagoshima at 6:00 PM arriving Motobu at 4:30 PM the next day. That's a one-way price.

SkyMark flys from Fukuoka to Okinawa for less than that ferry price.

thanx guyz, you've been very useful