Question

Pearls are made by which sea creature?

Answer 1

Oysters. I am not able to post a link. I wanted to credit the source of my info.  It's from the Smithsonian.   Anyway it says according to Gabriella Farfan, it's also musseles and clams that can produce gem-grade pearls but commercilally. 

Answer 2

Pearls are made by oysters, specifically the ones that live in saltwater. These creatures create pearls as protection when an irritant, such as a piece of sand, enters their shell. The oyster then covers the irritant in layers of nacre, which over time forms a pearl.

Answer 3

Pearls are made by oysters and other mollusks such as mussels. When a foreign object, such as a grain of sand, enters the oyster's shell, the oyster secretes a substance called nacre to coat the irritant and protect its soft tissue. Over time, layer upon layer of nacre is deposited on the irritant, forming a pearl. Pearls come in many shapes and sizes and are valued for their beauty and rarity. They have been used in jewelry for centuries and are associated with luxury and elegance. 

Answer 4

Pearls are made from oysters and found inside them. They are typically used in jewelry and are incredibly popular on a global scale.