The new show in Mermaid Lagoon simply titled “King Triton’s Concert” opens April 24th, 2015 at Tokyo DisneySea. Maidigitv went to an early preview of the show and took this excellent video. The show utilizes the FastPass system. Expect long queues and FastPasses to run out quickly for the first couple months.
Please note, that the video contains spoilers of the show.