I have a 7 year old and he loved the seal show, it was funny. We were visiting during Christmas and we saw the holiday and regular version of the show.
We both really liked the acrobat show. The cast played their parts well and it was memorable. They only had one showing when we were there.
We also really liked Pets Ahoy. All of the animals did some pretty neat tricks.
I really liked all of the shows but we have Busch Gardens plat passes which work at Sea World. We went for two days and could squeeze it all in. Even then, we didn't see the dolphin show. Since this is a wildlife park, I think you can skip the acrobat show and pets ahoy. I would try to see Clyde and Sealmore show, this was a favorite. You can't skip Shamu but it is in a huge theater, a little preachy for my taste, and over produced/slick.
Have fun at Sea World. We had a great time and enjoyed the shows.