Osaka Aquarium Kaiyukan in 1990; and Yokohama Hakkeijima Sea Paradise in 1993. Along with dolphin shows, sea otters were a big draw at the aquariums. At the peak in 1994, more than 120 sea otters ...

OSAKA -- Kaiyukan, an aquarium in Osaka, aims to attract more visitors from abroad as it marks its 35th anniversary in July. Aquarium officials have high hopes the Expo 2025 Osaka, Kansai ...

But luring in prey isn't the only advantage of bioluminescence, which can be seen in more than 75% of deep-sea fish, according to a 2017 Nature study by researchers with the Monterey Bay Aquarium ...