Fact: That may actually be true of a few of the smallest spiders, and of certain crab spiders that have small fangs. However, there are well-documented human bite cases from spiders as small as 3 millimeters long. (The bites caused no ill effects, of course!)
It's not that spiders can't bite, but that they don't bite except very rarely. And on those rare occasions, the bite almost always has only trivial effects on the human, who after all weighs from a million to several million times as much as the spider!
Fangs of typical spider from below, at tips of chelicerae (jaws) with teeth. Note that fangs are seldom visible from above.
Explore even more! Additional spider resources and more myths (poor spiders can't catch a break!).
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