All the tourism boards for Bora Bora claim there has never been a shark attack, but they can no longer. I ran across a report of this on TripAdviser while I was looking at the reviews for TopDive the Scuba diving company. Apparently one of the reviewers actually witnessed the attack and had the same detailed story that this link below tells. So I went digging for a bit online and eventually came across this news article on the actual attack:
This is actually VERY recent as well, as in the last 2 months apparently. An actual substantiated report of a Sicklefin Lemon Shark attack on a TopDive diver. Same story that was told in the post on the review site for TopDive. Apparently the Lemon Shark really wanted the shiny watch that was attached to the tourists arm and bit the watch clean off and his arm down to the bone. Unprovoked attack apparently. I don't know if this is the first report ever of a shark attack on Bora Bora, I am sure there must be other small incidents but this one seems to be the most significant. TopDive has stopped diving at the outer reef of Tapu into the Lemon Sharks apparently for safety precautions.
Personally I am going to avoid any diving or snorkeling activities that involve any kind of hand feeding, chumming or stirring up of sharks. As I don't believe that is the respect that one should give when diving around sharks in a natural habitat and you are just looking for trouble. It is one thing if you dive, which I fully plan to do, and you see some random sharks. But it is completely another when the boat crews are chumming and stirring up a frenzy above you or the dive master is hand feeding sharks 5 feet from you. It will be known to any of my dive masters that this will not be happening on any of my 4 dives or snorkeling events with my wife. She has enough to worry about finishing up her Open Water License as a first time diver.
As long as nature is respected, in most cases one will be fine, and that is how I am going to act during my visit next month.