ORLANDO, Fla. — SeaWorld Orlando is mourning the loss of one of its longtime killer whales named Katina. The theme parks says Katina was 50 years old and her health had been declining for some time.

SeaWorld is mourning the loss of Katina, one of its most beloved killer whales, who passed away at the age of 50. SeaWorld officials said Katina’s health had been in significant decline as she entered ...