structural:summarization
Saw and self-defense

Old stories often describe sawfish as highly dangerous to humans, sinking ships and cutting people in half, but today these are considered myths and not factual. Sawfish are actually docile and harmless to humans, except when captured; they can inflict serious injuries when defending themselves, by thrashing the saw from side to side. The saw is also used in self-defense against predators, such as sharks, that may eat sawfish. In captivity, they have been seen using their saws during fights over hierarchy or food.