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Riro, from the aquarium Marine World Uminonakamichi, has passed away today, 2025/1/4 (Japan). He was 17; They say his health has been deteriorating. The aquarium has been raising sea otters continuously since 1989, but Riro was the last sea otter they had. That means the only captive sea otters in Japan are Kira and May at the Toba aquarium.
https://marine-world.jp/news/post-7034/
