Revealing mistake: When Dr. Menard is driving and discussing the zombie plague with the visitors, the "clean" part of the jeep's windshield (i.e. the path of the windshield wipers) appears to be cut out of the glass (probably to provide a better view of the actors and prevent the camera being reflected on the glass).
Zombi 2 (1979)
1 revealing mistake - chronological order
Directed by: Lucio Fulci
Starring: Al Cliver, Ian McCulloch, Richard Johnson, Tisa Farrow
Continuity mistake: During the underwater scene where the zombie is fighting with the shark, the zombie's arm is bitten off by the shark. However, we see him with the arm after he loses it, and without the arm before it is bitten off.
Newspaper Editor-in-Chief: West, keep the British accent out of your prose. Don't take advantage of the fact that your uncle owns the paper.
Peter West: As if I would.
More questions & answers from Zombi 2
Chosen answer: After the original zombie extra fell ill, the shark handler was made up to play the underwater zombie. The shark was tame, or at least enough to not attack the handler. The makeup would have been latex/oil based, so it would not have been affected by the water. I remember from the commentary that the filming took 1 or 2 days.