CHICAGO (AP) _ Suburban Chicago zoo officials say 54 stingrays are dead after oxygen levels dropped in a tank.
In a Saturday news release, operators of the Brookfield Zoo said veterinary staff and the zoo’s animal care unit responded and were working to get the tank’s oxygen levels back to normal. Four southern stingrays and 50 cow-nose rays.
The stingrays were in a shallow pool at an exhibit that allows visitors to touch and feed the animals.
The Chicago Zoological Society says most of the deaths happened on Friday afternoon.
Bill Zeigler is a senior vice president at the society. He says staff is devastated by the loss of the animals and worked hard to try and save the animals.
Officials are closing the seasonal exhibit for the rest of the summer.