Aquarium

A diver wearing a Santa Claus costume feeds a sunfish to attract visitors at the Hakkeijima Sea Paradise aquarium in Yokohama, suburban Tokyo

Tsuno Yoshikazu/AFP

A diver wearing a Santa Claus costume feeds a sunfish to attract visitors at the Hakkeijima Sea Paradise aquarium in Yokohama, suburban Tokyo

An Irrawaddy Dolphin is made to jump through hoops during a performance at Pattaya Dolphin World and Resort, in Pattaya, Thailand, about 170 km southeast of Bangkok 08 August 2014. The zoo runs multiple dolphin performances where captive endangered species dolphins are made to perform for bus loads of tourists. A number of populations of these dolphins in south-east Asia are listed as critically endangered.

Barbara Walton/EPA

An Irrawaddy Dolphin is made to jump through hoops during a performance at Pattaya Dolphin World and Resort, in Pattaya, Thailand, about 170 km southeast of Bangkok. A number of populations of these dolphins in south-east Asia are listed as critically endangered

A beluga whale sprays water onto visitors at a summer attraction at the Hakkeijima Sea Paradise aquarium in Yokohama, suburban Tokyo on August 6, 2014.  Tokyo's temperature climbed over 35 degree Celsius on August 6 following a heatwave in the area.

Yoshikazu Tsuno/AFP

A beluga whale sprays water onto visitors at a summer attraction at the Hakkeijima Sea Paradise aquarium in Yokohama, suburban Tokyo. Tokyo’s temperature climbed over 35 degree Celsius on Wednesday following a heatwave

Visitors stand watch blue fin tunas in a 2,200-ton tank at Tokyo Sea Life Park in Tokyo, Monday, July 7, 2014. The tank is designed to create artificial flow of the ocean to keep the fish alive.

Koji Sasahara/AP

A visitor watches blue fin tunas in a 2,200-tonne tank at Tokyo Sea Life Park on Monday.

Visitors look at fish in the aquarium inside the Chimelong Ocean Kingdom in Zhuhai on April 29, 2014.  The park which claims to be the world's largest ocean theme park was built at an estimated cost of USD3.3 billion and opened in March of this year.

Mark Ralston/AFP

Aquarium visitors take in the submarine view at the Chimelong Ocean Kingdom in Zhuhai, Guangdong province, China on Tuesday. The ocean theme park claims to be the world’s largest and opened in March.

Jelly fish tank at Beijing Aquarium...epa03822115 People take pictures of jelly fish inside a tank at the Beijing Aquarium in Beijing, China, 12 August 2013. The aquarium, part of Beijing Zoo, is considered the biggest in China.  EPA/DIEGO AZUBEL

Diego Azubel/EPA

Visitors take pictures of jellyfish inside a tank at the Aquarium in Beijing. which is part of Beijing Zoo and considered the biggest in China 

A diver performs with sardines as part of summer vacation events at an Coex Aquarium in Seoul, South Korea, Wednesday, July 31, 2013.

Ahn Young-joon/AP

A diver performs with sardines as part of summer holiday events at Coex Aquarium in Seoul, South Korea.

Pedestrians stop and look at tropical fish from Japanese southwestern island of Okinawa at an outdoor aquarium in central Tokyo, Japan, 19 July 2013. About 400 from 15 species are swimming in the tank of the temporary aquarium on display until 01 September to attract visitors and business people in central Tokyo.

Kimimasa Mayama/EPA

Pedestrians stop and look at tropical fish from the Japanese southwestern island of Okinawa at an outdoor aquarium in central Tokyo. About 400 from 15 species are swimming in the tank of the temporary aquarium on display until September 1 to attract visitors and business people.