Yes that is an asterina starfish. Some have been known to munch on zoas. My tank is infested with them after being up for 6 months. But the up side to that is I have enough to feed a harlequin shrimp. But they started really mowing down on some coraline algae. So you can either remove them, watch them to make sure they dont eat zoas, or let them reproduce for awhile and get a harlequin later. I vote for the harlequin shrimp route
The arms are all different lengths because they multiply by dropping an arm which grows into a new star. They multiply like crazy, but as others have said, they are USUALLY harmless.
I've heard so much conflicting info. on these little guys, but came to the conclusion that they seem to have individual tastes, some harmless/others harmful... The ones in my tank stick to my liverock and seem to only enjoy munching on my coraline, but they leave all my corals alone.
I've heard bad things about them, but have never had a bad experience myself. Their populations seem to come and go in my tank. All over the place for a while, then they disappear.
Mostly harmless. I had a population explosion of them for a short burst and they did not touch my LPS/SPS. I did not have zoas though and that's the biggest myth on what they eat. I believe someone on RC had a video of one chomping on his zoas
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.