This post by Bob inspired me to ask a question that's been lingering for some time. In most locales, life gets scarcer when you go deeper. Yet deep diving has some rewards, biologically speaking. I've heard of the sponge belt in Cayman, and the PNW has its own fun stuff deep. Southern Florida seems to have some interesting wildlife deeper. And, I suppose if you had a hankering to see the big lionfish that'd probably be a reason to too? 
What wildlife do you see in technical depths (let's call it >130ft for this discussion) that you can't see anywhere else? Was that the reason you got trained, or is it just a happy side-effect?

What wildlife do you see in technical depths (let's call it >130ft for this discussion) that you can't see anywhere else? Was that the reason you got trained, or is it just a happy side-effect?