Not for great whites, because great whites can't be kept in captivity (there's some kind of sonar system that gets messed up and the sharks won't eat), but with other species of sharks they do
There is over 300 different species of shark, which species are the kids swimming with?
I'll give you a hint...it isn't Tigers, Bulls, Whites, Mako's, Hammerheads etc etc etc.
The point I was trying to make was that you can not train all living things to do something that is against their nature.
Dogs for example....different breeds have different temperaments. Some are affable and gentle in nature, other types are aggressive and fiercely loyal in nature. None of them though, have a sense of right and wrong. This just doesn't exist to them. All they have is experience to figure out which actions they do create what consequences.
I guess in some ways dogs are smarter than most humans. Get a dog drunk and he will probably abstain from drinking ever again. Get Me drunk and ...welll..even after suffering the hangover I will likely repeat the process again at some point.

Pit Bulls and their derivatives instill no trust in me due to their nature. They are fiercely loyal to a fault, which means that they will aggressively protect the pack ( and you and your family are their pack). The problem I see with that is that they seem to have no degree of measure and what you or I don't see as a threat, they often do. I would rather have control over when any dog uses aggression. There has been to much controversy and messed up incidents with these kinds of dogs for me to put any trust in them. I think that they have more potential to snap than any other breed and when they do it is often devastating.
RTR