jisses 7,5 miljoner liter... 3 valhajar.... Mating Behavior of the Manta Ray was observed in Okinawa Churaumi Aquarium. Okinawa Churaumi Aquarium has been succeeding in keeping the Manta Ray for the first case in the world since November, 1988. On June 8, 2006, finally we observed the mating behavior (Manta birostris) and copulation, and video recorded such activities for 5 minutes. http://www.kaiyouhaku.com/en/news/06072501_01_report.html