Freshwater pearl mussel Freshwater pearl mussel The freshwater pearl mussel ("Margaritifera margaritifera") is an endangered species of freshwater mussel, an aquatic bivalve mollusc in the family Margaritiferidae. Although the name "freshwater pearl mussel" is often used for this species, other freshwater mussel species can also create pearls and some can also be used as a source of mother of pearl. In fact, most cultured pearls today come from "Hyriopsis" species in Asia, or "Amblema" species in North America, both members of the related family Unionidae; pearls are also found within species in the genus "Unio". The interior of the shell of "Margaritifera margaritifera"
Pearl Krabs vein to "Mother of God," as a reference to the absence of Pearl's mother. His use of the phrase only when he is dismayed or shocked has led some viewers to believe something tragic happened to Mrs. Krabs. At Dragon Con in 2016, Lori Alan and Rodger Bumpass addressed Pearl's origins as their characters Pearl and Squidward. In the skit, Squidward asks Pearl if she is adopted. Pearl does not give a definite response, instead saying that she gets emotional over the topic. Later at the same event, the actors discussed the disappearance of Pearl's mother. Alan affirmed that Mrs.