Underneath Vash'jir

[Rosulm]

Today as I was looking for a rare spawn in Vash'jir, I found a mob that can force you to go through walls using one of its attacks. This mob is called Snawjaw Grouper
Snapjaw Grouper - NPC - World of Warcraft
Using this guy to force me through Nespirah, I was able to find certain spots that go underneath vash'jir and other places you can explore. Some screenshots to help explain:

Here's the point on the map at which you can use a grouper to push you through the wall. South of Nespirah.


And here's the grouper itself:


Me being pushed through the wall:


And finally, the one spot where you can go through the bottom of vash'jir:


You can just mess around in there, but watch out, if you swim too high you will end up inside the shell.