He went to Poseidon Elementary together with Plankton in 1950s.
He served in the Navy.
Long time ago, he was friends with Plankton.
He has a daughter named Pearl (born 1990)
He likes Money
In the Episode "Penny Foolish" He tried to look for SpongeBob's penny (which SpongeBob picked up from the street)
Was shown as babies in "Goo Goo Gas" and " Friend or Foe"
In "Sleepy time" Mr. Krabs was finding his Dollar.
Krusty Krabs was opened by Mr. Krabs in 1970s.
In "Money Tales/SpongeBob vs. the Patty/Slimy Dancing" Mr. Krabs was showed.
Now in 2008, He's still young.