 My sailing boat named Rosemarie will have a happy sound of the Walt Grohler Orchestra. Attention shark fanatics! Celebrate the misunderstood masters of the deep during FinFest at Greater Cleveland Aquarium July 9th through August 6th. Whether you're standing under a sand tiger shark, quizzing a scuba diver, meeting our mascot, trying your hand at trivia, or striking a yoga pose in front of a 230,000 gallon shark habitat, you'll make a splash.