It has been more than five years since the famed
"Crocodile Hunter" Steve Irwin died while snorkeling at
Batt Reef in Queensland, Australia, during a shoot for a
series called Ocean's Deadliest. He swam too close to a stingray
that thrust its barb into his chest, piercing his heart and killing
him shortly after. (We wrote about the incident, and the
backlash, in our October 2006 issue, which you can read at www.undercurrent.org )
The South Pacific Underwater Medical Society (SPUMS)
  collects diving fatalities in Australian waters every year in its
  Diving and Environmental Medicine journal, although it typically
  publishes them a few years later, as researchers need to compile
  the reports from witnesses, police and coroners to create
  their case studies and analyze the results and factors leading
  to the deaths. Below is what SPUMS wrote - -and concluded
  - - about Irwin's death.
Although the coronial papers about this incident are
  unavailable (at the request of the victim's family), some of
  the media reports combined with other enquiries provided
  useful details.
This victim was a 44-year-old male who was apparently
  fit and healthy, and an experienced snorkeler. His death occurred while he was making a documentary film about
  marine life. He was snorkeling and, at the time of the incident,
  was reportedly standing on, or floating above the reef
  in water of a depth of about five feet of seawater. He was
  very near a large stingray (bull ray), reportedly with a wingspan
  of approximately three feet across. He was positioned
  to enable a nearby cameraman to film both the stingray
  and himself in the same frame. The cameraman was in
  front of the stingray, and the victim was behind and above
  the ray when the ray turned around, rose and flicked its
  barbed tail, hitting the victim forcefully to the left of his sternum.
  He was seen to pull the barb out but then collapsed.
  Resuscitation was attempted on the boat and continued on
  shore, but was unsuccessful.
Autopsy: There is no autopsy report available but other
  sources report that death was found to have resulted from
  cardiac tamponade.
Comment: A tragic death resulting from the victim positioning
  himself too closely over and above a stingray, and
  likely causing it to feel threatened and trapped. The shallow
  depth placed the victim within range of the stingray's barbed
  tail. Removal of an embedded stingray spine is generally
  discouraged in the first-aid setting, as it is likely to further
  increase the trauma caused by the rear-facing serrations, and
  'unplug' the wound. However, it is unknown whether this act
  made any difference to the outcome of this incident.