I'll finish with a happy picture:

KIF_2318
Originally uploaded by abnihon.

pretty fishies in a tank at the airport, to promote Okinawa's new aquarium. The aquarium looks cool, but it's 3 hours from Naha, so I didn't go.

I probably would have seen something like this off of Tokashiki island if the water had been calm and clear enough for snorkeling that day.