You can also look at a Sea World annual pass. In May you can get the AP for $119 and then a non dolphin swim is $69 and dolphin swim is $169. You can book it prior to getting your AP so verify the rate before you buy one. Then you have to show it when you check in.
Sometimes it can save money and sometimes not, for example in July there is no discounts for having an AP.
When I went to Discovery Cove in September last year, I got the dolphin swim for $189.99 and the non-dolphin swim for $121.99 through AAA (tax not included).