I don't think anyone has declared them extinct but the last few rounds of protests over the airfield have lead to extensive searches and no sightings. Strange for a slow moving, often at the surface critter.
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Orwan Bay - better known as Oura Wan Bay, off Camp Schwab...probably did a hundred plus dives there and never saw a one. Also lived right off the beach, and would walk along the water at night (supposedly they're out in the evening), but again, nothing. And up there you'd be able to see a big dark object when vis is near-perfect and the depth is only 7'
Baracuda and Japan diver you seem to be the most vocal of divers on Okinawa, does anyone else on Okinawa or the rest of the world know about the diving on Okinawa?
Nope!