A third beluga rescued from the shuttered Marineland of Canada and transferred to Shedd Aquarium died on Monday, marking the aquarium's fourth beluga death since the rescue effort started, a spokesperson confirmed. Osiris, a 26-year-old rescued female beluga who arrived at Shedd in late July, passed away, the aquarium announced in a social media post. So what’s going on? We break down what Shedd has said about the deaths and the health challenges facing the rescued whales. #SheddAquarium #BelugaWhales #Chicago