Wikipedia is amazing. They already have an update on Irwin's death + have it crossreferenced when you look up "stingray".
http://en.wikipedia.org/wiki/Steve_Irwin
Shortly after 11:00am local time on 4 September 2006, Irwin was fatally pierced in the chest by a stingray barb while diving in Queensland's Batt Reef, which is part of the Great Barrier Reef. The events were caught on camera and the footage is now in the possession of Queensland Police.[24] Irwin was in the area filming his own documentary, to be called The Ocean's Deadliest, but weather had stalled filming. Irwin decided to take the opportunity to film some shallow water shots for a segment in the television program his daughter Bindi was hosting,[25] when he swam too close to one of the animals, which have a poisonous barb on their tails, his friend and colleague John Stainton said. "He came on top of the stingray and the stingray's barb went up and into his chest and put a hole into his heart," said Stainton, who was on board Irwin's boat at the time.
After reviewing the footage of the incident and speaking to the cameraman who recorded it, marine documentary filmmaker and fisherman Ben Cropp speculated that the stingray "felt threatened because Steve was alongside and there was the cameraman ahead..."[24] In such a case, the animal responds by automatically flexing the serrated barb on its tail, which is up to 30 centimeters (roughly 12 inches) in length, upward. In this case, the motion struck Irwin's chest and pierced his heart.[24] Crewmembers aboard his boat called emergency services in the nearest city of Cairns and administered CPR as they rushed the boat to nearby Low Isle to meet a rescue helicopter. Medical staff pronounced Irwin dead when they arrived a short time later.[26]
http://en.wikipedia.org/wiki/Stingray