The fish tank that's so big it can hold FOUR whale sharks

It holds a staggering 7,500 tonnes of water - roughly equal to three Olympic-sized swimming pools.

Eighty species live in the Kuroshio Sea tank, including yellow-fin tuna, bonito (a type of large mackerel) and manta rays.

But the daddy of them all is the world's biggest fish, the whale shark - which can grow to be 12 metres long and needs a quarter of a tonne of food every week.