20,000 Leagues Under the Sea (1991)

Interested in what happened when a ship with a huge hole in the side washes up on shore, three boys, Joey, Allen, and Ned, stowaway in the cargo bay of a ship. When the ship gets attacked, they are left behind because they aren't on the roster. They are rescued by the rising of a gigantic underwater sea vessel (which the narrator decides he'll call a submarine even though they hadn't been invented at the time of the story) commanded by the enormous Captain Nemo, who doesn't want to hurt them but wants to keep his ship a secret. They fight a shark the the narrator insists is stock footage from another movie, beat up a crying octopus, get stuck between icebergs while the first mate is steering the ship, and ultimately get caught in a sea vortex before waking up.