Mob activity in Hads C is very rare, but once in a Calypso Moon you will come accross an Araneatrox. This is one that was near the teleporter that I was running towards, with some brave colonists attempting to get sweat from it.
Thanks :) I then tried to get alot closer to get a better shot, but I got run over on three attempts because it suddenly lost interest in the sweaters and went after me. In the end I had to go to another TP at Hads.