The animal that killed him wasn't considered "dangerous." He was filming World's deadliest animals , but they couldn't do it on that day so he was doing something for another person on other sea creatures. It really was a freak accident, but even still when you are dealing with animals that have the potential to kill you all the time, you run that risk. I am also guessing, because the stingray wasn't considered all that dangerous he may have been taking undue risk.
Well put.
