This is what is posted on the Seaworld Orlando FAQ:
Restaurants and concession stands are located conveniently throughout the park. Large hard or soft coolers, glass containers, food, drinks and picnic lunches may not be taken into the park. Guests with special diets, baby formula or baby food may bring their items into the park.
Please click here for information about the unique dining programs offered at SeaWorld Orlando.
Please click here to make a reservation for one of the SeaWorld Orlando dining programs.
Guests wanting to make seating arrangements to at Shark's Underwater Grill can do so by visiting the host/hostess stand in front of the restaurant on the day of their visit. Reservations can be made in person after 10 a.m. the day of your visit.
of the restaurant on the day of their visit. Reservations can be made in person after 10 a.m. the day of your visit.
(i'm not sure how much they enforce this)