Scientists think the mother orca helped her son kill the newborn in an effort to perpetuate his line of offspring.
Kasatka made international headlines in 2006 when she grabbed her trainer during a show and dragged him underwater, breaking his foot.
Three-month-old Kyara came down with an infection over the weekend before dying on Monday, SeaWorld announced.
Dart the dolphin is the fourth death at the park since last summer.
The 18-year-old killer whale is the third to die at the San Antonio park in the past six months.
NZ man captures incredible footage of his close encounter with an awesome orca.
The documentary film, in theaters next week, details the dark side of keeping killer whales in captivity. That dark side also includes the mistreatment of humans.
Plus Aaron Paul and the word "bitch," what it's like to be chased by killer whales, and film-set photos by the Big Lebowski himself.
Somewhere in Fictionland Captain Ahab is having a conniption. The whale, named Iceberg by scientists, is the only known mature male killer whale to be white.
An extremely rare white killer whale was recently spotted in Russia. Please don't tell Sea World.
You know you want a slice of herring cake. Moana the one-year-old killer whale received this fishy treat for her birthday party at Marineland in France.
Was he trying to communicate with it? Luna was well known in the Puget Sound for his affinity for boats. You can read more about him HERE.