Corrected entry: If Aquaman had lifted the sub up to the surface that fast, everyone onboard (both the sailors and the pirates) would be dead because they didn't properly decompress.
Corrected entry: When the boat is attacked by the creatures from the deep, they are very sensitive to light. The lightning doesn't seem to bother them at all, though.
Corrected entry: The ability to breathe outside the water changes from one Atlantian to another - Arthur, Volko and Mera can do it, but Orm and the soldiers have trouble with it, then in the last fight with Aquaman now Orm can breath fine.
Correction: Only high born Atlantians can breath air, others like soldiers choke to death without water to breathe. This is mentioned in the movie. The reason Orm seemed to struggle was because he didn't see it coming and because it was probably his first time ever. The second time he was prepared for it.
Corrected entry: Orm was reigning at the time Steppenwolf stole the mother box from Atlantis - he should be rejected by his people but in the film he is loved and admired by everyone instead.
Correction: Because the pressure inside a submarine is the same as at the surface. In other words, they never experience any pressure increase on their body since the submarine is protecting them.