Nope... We have 2 shrimp and 3 hermit crabs. Though we think it may have been there when we bought it, we didn't notice, though saying that, that was a shrimp only tank.
We're worried as we'd plan to add our first fish this weekend. I don't want to be passing anything on.
It hasn't seemed to effect him though. he's still very active, and eating fine. Strange!