Passport Member website, this offer lets pass holders purchase the Adult dining deal at the Children's price of $17.99, a discount of $15. The All-Day Dining Deal is an all you can eat wristband with unlimited trips to most counter service restaurants and snack stands, essential SeaWorld Parks answer to the Disney Dining Plan. Normally it's only a good deal if you plan to spend most of the day at the park or want to eat a lot in a short span of time, but at $17.99, one meal, a few beverages, and a snack will quickly ad up to some savings.
This discount has been quietly rolled out and isn't particularly easy to find. Once logged in to the Passport website, you must scroll down to "Passport Member Savings" and click the link for "Special Savings on Dining Experiences." At this time, there is no indication whether this discounted deal is purchasable at the park, so it's best to pay for it online ahead of time just in case. As well, this special is not currently available for Busch Gardens Tampa's All-Day Dining Deal.