Conversation so far:
When did Steve Irwin die?
Steve Irwin died on  September 4 2006.
How did Steve Irwin die?
Irwin died after being pierced in the chest by a stingray barb.
Where was Steve Irwin when the sting ray struck?
He was filming in Australia's Great Barrier Reef.
was Steve Irwin shooting a documentary at the time of his death?
He was filming an underwater documentary titled Ocean's Deadliest.
Why did the sting ray strike Steve Irwin?
The stingray's behaviour appeared to have been a defensive response to being boxed in.

Question: was Steve under water when this happened?
Self-contained rewrite: was Steve Irwin underwater when the sting ray struck him?