A giant tuna on display at a US public aquarium has died after it swam head-first into the tank's viewing window.
The 104kg/16.36 stone Bluefin tuna was on display in the Monterey Bay Aquarium's Outer Bay Exhibit and was found dead yesterday after it smashed into one of the tank's 33cm/13" thick acrylic viewing windows.
According to a report from The Mercury News, a digital camera which monitors the aquarium showed the fish swimming along with two other tunas in its million US gallon tank and then suddenly ramming the window.
The fish, which measured 168cm/5'6", was found dead on the floor of the tank the following morning.
Karen Jeffries, spokeswoman for the Aquarium, told The Mercury News that this was not the first tuna to have died after smashing into the tank walls.
A bubble curtain is used to provide a sensory and visual indication of the position of the viewing window after dark, which is designed to stop the fish ramming into the glass.