They're nothing more than water circuses," Daniel Turner says of dolphinaria, or animal parks featuring dolphins.
Mr Turner is a spokesman for Born Free, a charity which is actively campaigning for the closure of all dolphinaria worldwide.
"These animals have no life worth living in captivity, devoid of any form of stimulation and social interaction, unable to swim hundreds of kilometres a day or live in family groups," he says.
"If people really want to engage with these animals to truly be inspired by their intelligence and see how they live, they need to see them in the wild ; there's plenty of opportunity for them to do so."
Many of the million-plus tourists who visit the tiny Caribbean archipelago of Turks and Caicos Islands (TCI) each year hope for just such an encounter with a wild dolphin.
A friendly bottlenose called Jojo has been interacting with people voluntarily since the 1980s and is popular with locals and tourists alike. Tim Ainley, a tour operator on the TCI island of Providenciales, has been swimming regularly with Jojo since 1985.
He echoes Mr Turner's sentiments.
"You learn nothing about a dolphin watching it jump through hoops," he says.