I have always wondered why people want to get rid of these little starfish I have a bunch in my tank.
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They reproduce quickly and some are known to munch on corals.
Just use your fingernails or a credit card and pull them off. Be careful not to dislodge one and lose it in the tank or you'll probably never see it again until it's made a billion clonesWhat's the best way to remove them?
If you have a ton and can hold them in a container for a day, you might try listing them on the livestock forum. Someone who wants to seed their tank or especially anyone with a Harlequin shrimp would likely pay the shipping for you to mail them (they ship pretty well in my experience).