Bark= Jazz Bass, particularly the bridge pickup
I call that "burp".
Seriously: this thread proves that "growl" is an amazingly vague term. Yeah, the consensus is usually that P-basses thump and J-basses growl, but that's a misleading stereotype because there are many different P-bass tones, many different J-bass tones. You can get thump from a J, and growl from a P.
So, here's some friendly advice to anyone looking for a certain tone: GIVE US AN EXAMPLE. You could cite a particular song, album, or band -- or even better, post an audio link. There's a place called YouTube where you can find almost anything.