Heroes star Hayden Panettiere is the latest celebrity to speak out against Seaworld after its recent tragedy.The 20-year-old actress, who is a campaigner for dolphins and whales, recently spoke about the death of a trainer at Seaworld, who was killed by Orca Tilikum.Panettiere said to The Dish Rag: 'Honestly, it's horrible what happened. Three deaths by the same whale, by an animal that should not be in captivity in the first place.

'How do you put an interactive, social animal, one of the smartest animals in the world... and you're going to stick them in a tub and make them do tricks? Because they make money? It's disgusting and Seaworld is absolutely wrong. This is a big wake-up call.'How many more people are going to have to be killed? When are we going to realise that these animals are not supposed to be there?'