It's your new spider friend.
Just wait.
It will take up a corner and soon the web-encased carcasses of flies and mosquitoes will litter the area.
It will then move to you when its bloodlust cannot be satisfied.
I don't think it would be an issue for me to shell out ten bucks or so.
Looks like I won't have to though, seems like the early voting is in favor of this place remaining ASMB 2: Electric Boogaloo.