Have a FP and arrive 45 min early?
How early without a FP?
Finding Nemo the Musical'a seating procedure is unique.
First, all FP+ guests are allowed into the theater about 30 minutes before the upcoming show-time, and those guests can choose any seats they like.
After all FP+ guests are seated, they open the doors to any standby guests, who can choose any seats still available.
In order for a FP+ guest to have the BEST choice of preferred seats, they should arrive about 45 min. (or earlier on busy days) to be closer to the entrance doors in the FP+ line.
That also means that standby guests who arrive, say, 45 minutes before showtime, will
be ahead in the standby line of any guests who arrive nearer to show-time.
If standby guests arrive too close to show-time, they may have very few choices of seats,
if any, on a crowded day and/or busy performance.