Oysters are the primary producers of pearls, clams and mussels can also create pearls, though this is much less common. Most pearls come from oysters, which thrive in both freshwater and saltwater ...

What's inside a clam? A retractable foot, a siphon for sucking up water, powerful muscles, and, sometimes, a pearl. And you thought oysters were fancy. Following is the transcript of the video.

a large oyster shell, donated to the Museum in 1886 and containing a peculiar pearl. Rather than a spherical shape, the growth is spread over the shell's surface in the unmistakable shape of a fish.

Pearls are made by marine oysters and freshwater mussels as a natural defence against an irritant such as a parasite entering their shell or damage to their fragile body. The oyster or mussel slowly ...