Mr. Krabs' Nephews are a group of triplets that resemble their uncle, Mr. Krabs. According to Mr. Krabs, they solve mysteries. 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 and go off mumbling. Also they finish each others sentences. They only appeared in the episode Stanley S. SquarePants.
Their only known quotes are "But...Uncle.. Krabs..." and "Grumble, Grumble, Grumble...".
Mr. Krabs says that they love to solve mysteries. This is most likely a reference to Huey, Dewey, and Lewey from Duck Tales.
They may also be a parody of Popeye's nephews from Popeye.