I worked at Sea World when the "Dolphin Encounters" were opened. They are VERY clear in their instructions when they give you the tray of fish NOT to hold it above the railing. These Dolphins see a thousand idiot humans a day and know how to work the system. When I took my nieces there summer before last I was very clear to them on how to NOT TEASE the dolphins. The parents claiming that they never heard the rule "Do not lift the tray" are lying, It is posted throughout the exhibit and repeated over the PA system every few minutes. During feeding times they have several employees watching over the exhibit, including one with a microphone giving these same instructions along with other dolphin facts.
Poor dolphin is being exploited!!!