Discovery Cove is running an American Express special rate. For the month of December you can get Discovery Cove plus 14 day consecutive at SeaWorld and Aquatica for $189. That is with dolphin swim. On top of that, for $20 more you can include Bush Gardens Tampa with free transport.
No Amex? No problem, me neither. I used an Amex gift card I bought at a Canadian pharmacy. Any Amex card will work.