What's with the little fish?
Pearls are made by marine oysters and freshwater mussels as a natural defence against an irritant such as a parasite, secreting layers of aragonite and conchiolin which in turn creates "mother of pearl" which encases the irritant. https://video.nostr.build/d88880c8dc241199063fd5a3592fa99147e010ae01b6678563c20c785538baf6.mp4
Discussion
Nothing, they were living in the shell