I got a response from Greenbean basically saying that he thought it was a sponge and didn't see any particular reason to worry about it. Calfo answered a whole bunch of stuff yesterday, so I'm sure he saw my question as well, but he didn't add anything so I'm kind of assuming he just agreed with what Greeanbean said and left it at that. So, evil looking black sponge dude that supposedly isn't going to hurt anybody.
....still, he's on his own rock in a corner of the fuge by himself. He looks kind of shifty, I don't trust him. :lol:
I also found what is either just a regular mushroom or perhaps a red colored ricordia growing in there too! I need to move him to the main tank. But it's pretty cool that he's growing under the fuge light is all.