My guild raided Kedge last night, and noticed that most of these sharks that spawned in the central corridor were in the 37-42 range, and that almost all of the ones we got that were 45th were all pulled from "Bubble"s room.
They also see invis a nasty little surprise when i was floating up from 3rd lvl one was coming down and needless to say ( i was low on health and planning to leave via entrance cos of oom) i floated back down dead...
I've fought ones of these that had a max of 97, and ones that hit for numbers like described above. Big spread, pay attention to con if you are in the 40s or high 30s and aren't sure you can take.
This creature usually spawns in the north room, 2nd level in Kedge. Can sometimes be seen with a piercer in the same room and due to pathing problems you have to be careful when you pull. I've been hit for 123pts before by this creature.