Mr. Krabs' Nephews are a group of triplet crabs that resemble their uncle, Mr. Krabs. According to Mr. Krabs, they solve mysteries. Also, they finish each other's sentences. They wanted a job at the Krusty Krab, only to be turned down by Mr. Krabs. They were also told to solve the mystery of why they didn't get the job, making them walk away, mumbling to themselves. They only appeared in the episode "Stanley S. SquarePants."
Their only known quotes are "But... Uncle... Krabs..." and "Grumble, grumble, grumble...".
All three of them look like their uncle Mr. Krabs, except for them being much younger, smaller, and not having an undershirt and belt.
Mr. Krabs says that they love to solve mysteries. This is most likely a reference to Huey, Dewey, and Louie from DuckTales.
They may also be a parody of Popeye's nephews from Popeye.