I want to say that Shamu Rocks is only a summer months show as I don't recall it being around much longer last year than that. I checked the schedule for the 26th and the last Believe show is at 7:45 that day and Shamu Rocks is at 9:15, so they are still running Believe but the times will probably change for however late the park is open. I took this off Sea World's website:
Opening this Memorial Day Weekend, Shamu Rocks is a rock n’ roll concert of unprecedented proportions combining improvisational movements of killer whales with music remixed with some of the hottest rock stars in the industry including Jennifer Lopez, Savage Garden, Lifehouse and Shakira.
Driven by an urban beat and colossal effects, Shamu and a team of skilled trainers take center stage as killer whale performances transform the arena into joyous frenzy. Pushing the limits of a stadium performance through technical magnitude, animal feats and creative prowess, Shamu Rocks provides guests with a one-of-a-kind experience only SeaWorld could create. Taking the performance to dynamic magnitude, a 3-story tail fluke flanked by four, 20-foot-wide rotating LED screens dominates the scene and showcases abstract visuals that can be combined to create an 80-foot-long panoramic screen, setting the stage for a colossal multimedia presentation. Nearly 100 speakers throughout the stadium provide an optimal rock n’ roll surround-sound experience.