Stage acting has lost some ground in recent years to 3-D film, due in no small part to thespians’ unwillingness to perform on-stage with great white sharks. Soak in all three dimensions with today’s Groupon: for $5, you get one adult ticket to the Simons IMAX Theatre at the New England Aquarium on the waterfront (a $9.95 value). This Groupon is not valid on films after 5 p.m.

The Simons IMAX Theatre's six-story, high-resolution screen whisks viewers across the starry universe and under sparkling seas, destinations once limited to Soviet space trout. With this deal, you get one adult ticket to any film before 5 p.m. on its schedule. Witness such massive educational celluloid as Sea Rex 3D: Journey to the Prehistoric World and Jean-Michel Cousteau’s Dolphins and Whales 3D. Colorful creatures leap from New England’s largest screen, and 12,000 watts of digital surround sound tickle your eardrums with the sounds of cooing dolphins and the mating call of the Hubble Telescope.

Pay a visit the seals at the aquarium after a viewing of Under Sea 3D, which dives camera-first into the oceans of southern Australia and New Guinea.