Gush travels with the kids to the Arctic Ocean to finally find the mysterious "horned whale," which has eluded him for a long time. As it turns out, what they see is not really a "horned whale," but a narwhal. / After hearing that a great white shark has a toothache, Splash and friends enlist Denny to help, not realizing that in the world of cleaner shrimp cleaning the teeth of the great white shark is a revered accomplishment.