You could even take this a step further...

Patrick Star = Ron Weasley

Sandy Cheeks = Hermione Granger

and so on...

Special comic note. I always thought Squidward's name was Squidworth. I know I'm not the only one that thought this since a google search for "Squidworth" yielded quite a few results.

I have always thought that the character of Snape was very close to how Squidward is portrayed. Exemplified best by the animations and videos of the Potter Puppet Pals. If you've seen it you have also noted the similarities in voices. If you haven't seen these and you are a fan of Harry Potter...

Shame on you...