Ew. One of the Olympic pools has turned totally green.
The unsettling hue was noticed by a number of athletes over in Rio on Tuesday, and some were understandably disturbed.
British diver Tom Daley tweeted a picture of the green pool next to a clear blue one with the caption,
That can't be right, can it?
Pools turn green when there isn't enough chlorine in them to kill off bacteria.
It's not necessarily harmful, it just means the pool is probably being poorly managed.
And on that note, many of the athletes didn't seem to care about the murky color.
Pandelela Rinong of Malaysia said,
Paola Espinosa of Mexico added,
True Olympians swim in any water.