Location comparison: Santa Marta, Columbia to....

I'm thinking about taking a long trip down to Santa Marta, a small
city in northeastern Columbia. One of the things I'd be going down
there for would be to work at a diveshop, but before I commit I wanted
to see if I could get any advice from you all...

Basically, although I'm excited about the prospect of going someplace
different and improving my Spanish, I wouldn't be going if it weren't
for the diving. So I was wondering, can anyone give me some first
hand comparisons between diving around Santa Marta, and some of the
other places I've been, so I can get an impression of whether this is
going to a worthwhile trip, diving-wise? Anything you like to compare
on, viz, big and small fishes, current, depth... any info you can
give would be great, comparing to the following places that I've got
experience with:

- Thailand (Koh Phi Phi, Koh Tao, Similans)
- Marshall Islands (Majuro, Arno)
- Bonaire
- St. Thomas

Thanks for your help!

c