I have live rock from the Gulf in my slightly over two week old tank. One of the many critters that came in on it has six radial arms, each of which has numerous small branches on it, that periodically retract and are stuffed into a central mouth before being extended again. I just discovered it today, but it hasn't moved from its spot, even when I was reaching around in the tank to do stuff. It just retracted all its arms and pretended to be a little dark lump on the rock. The arms are kind of light gray and the body is a bit darker. The body is probably about 1/4" in diameter and the arms are maybe 3/4" long.
I'm guessing this is probably harmless, I'm just curious what it is.
Thanks!
Steve
I'm guessing this is probably harmless, I'm just curious what it is.
Thanks!
Steve
