Feather dusters? I'd keep em
I do have one of these. I think this is a feather duster. What do you think? When you put your hand by it, it goes back in the tube. It is very small, I wonder if it will grow bigger?
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It eventually grew on my coral and as my corals grew, the snails tore them open
Keeping a salt aquarium...a piece of the reef, means keeping all sorts of creatures that dwell in the ocean. I'm not sure why you would want to destroy things that are harmless. Isn't it counter productive? I don't see anything ugly. I see fascinating creatures that live through amazing extremes and make it into our tanks to build complex structures to protect themselves.
Pretty awesome really.