Although sizable pools for whales and dolphins require an extraordinarily technical and financial expenditure and are usually nearly impossible to provide and maintain, many marine mammal parks endeavour to improve the conditions of captivity and attempt to engage in public education as well as scientific studies.
In 2010, the practice of keeping animals in captivity as trained show performers was heavily criticized when a trainer was killed by an Orca Whale at SeaWorld Orlando in Florida [REF].