Scientists have decoded the secrets behind a goldfish's ability to survive in ... "If you put them in a beer glass and closed them off, it would take 200 days to get it up to 4%," said Dr Berenbrink.

To achieve this, we created a “fish tower”—a filled and inverted glass aquarium that extended above the surface of the water at a community aquaponics pond that housed approximately 100 goldfish. The ...