Well I'm pretty positive it is guts I spent about 3 hours cleaning pieces of it out of the tank going through rocks changing out 20 percent of the water. I had to also remove free up and clean both my powerhead and fluval filters due to being clogged and then finding more of it in the sump and even sucked up in the skimmer and that was nasty... All the perams check out fine still thankfully ..overall there was no anemone to be found

all in all made along night.