http://www.foxnews.com/science/2016/12/02/game-thrones-star-wants-everyone-to-stop-going-to-dolphin-shows.html
Stop dolphin shows

many people like to see dolphin shows. because it is very interesting right? you know what behind it all? they kill dolphin slowly but surely.they always want dolphin do their job and do not want give they food if dolphin do not want do their job. then to go to another city they just give the dolphin lotion to make their skin still,moist it can make dolphin survive at the street.

dolphin can live in the see around 40-50 yeras old, but if they do the circus they just could survive around 15 years old just that. do you like to see that? I do not think so when you read about it because dolphin loke to swim at the sea. and they can not meet their family at the sea when they do the circus.
conclusion :
stop dolphin circus because it would make the ecosistem getting hard and can make something bad for us