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good? bad?Asterina starfish I think.
not sure if they are bad. they do multiply quickly though. I siphon some out with every water change. I have no shortage of them in my tank and haven't noticed any negative effects from them.good? bad?
I have a new 20 gallon reef with several corals but I suspect this fellow came in with a couple I brought home from my LT’s today. I opt to pull it out as well as any others that materialize.Definitely asterina, some species seem to be reef safe and others not. They can reproduce rapidly though.