Continuity mistake: After Moana narrowly escapes drowning, she drags herself ashore next to some debris from a boat, one large piece especially, being by her right hand. After the pig runs away, she's not moved, but the debris around her has changed, and the large piece has disappeared.
Continuity mistake: When Moana is throwing sticks into the ground, after she starts singing, look back at that spot and all the thrown sticks have disappeared.
Continuity mistake: When Maui and Moana are on their way to return the stone, the base of Maui's hook is entirely on the boat. From a different angle, part of it is hanging over the edge.
Character mistake: When Maui and Moana set sail after defeating the Kakamora, Maui says they must head east. He turns the boat 90° as he says this. Throughout the next scene the setting sun is to the left of them (providing a beautiful backdrop to their fight), meaning that the boat must be heading north, not east.
Continuity mistake: When Moana is looking at the secret boats, a rock appears on the shore by the prow of one of them out of nowhere.
Continuity mistake: During the attack on the boat, it's jerked upwards, a hatch is opened, stays open, and Hei Hei falls in. Seconds later, from a different angle, the hatch is now firmly sealed again.
Plot hole: When Moana first meets Muai, she opens her necklace to tell him he will restore the heart. Muai sees the heart but doesn't get scared until he sees it again on the boat. He should have been scared the first time.
Continuity mistake: Maui steals a stone from TeFiti, turns into a bird, then lands on a raft with his hook in his hand. He looks at the stone, and when the shot changes back, his hook has disappeared.
Continuity mistake: After the chief stops his mother telling scary stories, pictures drop behind the kids. The one to the left of the one of Maui has three creatures with spiky heads. After the chief is knocked over we see those pictures again, and the one of three creatures has been replaced by one of an island with a cloud above it.
Factual error: As Moana ages from a toddler to 16 years old and her grandmother ages and gets grey hair, Pua the pig and Hei Hei the rooster do not age at all. Hei Hei should not even be alive, considering roosters normally live just six to seven years.
Continuity mistake: When Moana arrives on Maui's island, the sail to her canoe is gone, but when Maui leaves it returns.
Continuity mistake: After the sea retreats from Moana, a fish gets stranded by a shell and flaps its way back into the water, leaving a noticeable mark in the sand. As Moana approaches the shell in a different angle, the sand around it is undisturbed.
Other mistake: Maui's hook is shaped in such a way that it would be impossible for him to pry the heart from TeFiti as it is depicted in the opening sequence.
Continuity mistake: During the song "Shiny" the light from Tamatoa spins incorrectly at several points during the scene. At times the light reflecting off his treasure rotates with him. At others the light spins on its own while he is not moving.
Continuity mistake: Moana ushers a turtle back to the ocean using a large green leaf. She then goes towards the ocean to get a shell, and in the reverse angle the leaf has disappeared.
Other mistake: In the beginning, when Maui is about to steal the heart of TeFeti, his back tattoos. On his right side, you get a glimpse of the tattoo of TeKa hitting him and him loosing his hook. He shouldn't have that tattoo since it hasn't happened yet.
Suggested correction: He has the tattoo in that shot to represent when he first stole the stone and fought Te Ka for the first time.
Te Ka only exists because he steals the stone as it's the island with no heart.
Plot hole: All through the movie it is made known they have to get through TeKa to get to TaFiti. They fail and Maui leaves. Moana goes back alone and makes it through the barrier island and Maui returns to help her. The problem is he returns from the direction of TeFiti, if he can do that He could have done it all along, and therefore discovered TeFiti was gone.
Plot hole: Not knowing the twist at the end, Moana should have been overtaken by hopelessly knowing that Maui and a functioning fishhook are required to return the heart. We see right at the beginning that Maui was only able to reach the heart's resting place by transforming into a small lizard. The whole triumphant song is completely undermined as, based on available information she has 0% chance of success.
Continuity mistake: When Moana goes back to Te Fiti after Maui left, she puts Hei Hei in a basket inside the boat, but when she gets almost hit by a boulder the heart bounces away and Hei Hei appears, and gives it back to her, then never shows up again until the end of the movie. Where did he come from?
Continuity mistake: On his raft, Maui gives Hei Hei some food. Seconds later in the shot from above as Moana falls towards the raft, the food has disappeared.
