It is very rare that there are bugs in pearls. In the process of pearl formation, shellfish will produce a substance to wrap foreign bodies, and finally form pearls. Generally speaking, the foreign bodies in pearls are sand, eggs or other tiny impurities, not complete worms. So in general, pearls don't contain live bugs. If you see moving bugs in the pearls you own, it may be an abnormal situation or a fake pearl. I suggest you consult a jewelry expert to get a more accurate explanation.