| Unofficial name
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Pearl's lack of a mother is a reference to the phrase "mother of Pearl," which Mr. Krabs often says when something surprises him. Stephen Hillenburg (who had passed away in 2018) was against revealing the identity of Mrs. Krabs and had kept it a secret throughout the series. For this reason, it is unknown if Mrs. Krabs is a whale or is part whale, much like Mr. Krabs.
The exclamation "mother of Pearl!" is used in the following episodes, usually by Mr. Krabs:
- "MuscleBob BuffPants"
- "The Smoking Peanut"
- Zoo Day Disaster
- "Selling Out"
- "The Main Drain"
- "Squirrel Record"
- "Eek, an Urchin!"
- "Married to Money" - She is mentioned when Mr. Krabs says he may have found Pearl a new mother.
- It has been revealed Mrs. Krabs is a whale, shown in the picture.
This list is incomplete, but you can help Encyclopedia SpongeBobia by expanding it.