I noticed one of these a few months ago attached to one of my coral frags, now they seem to be spreading everywhere. They don’t appear to be bothering anything much but they are crowding out a Zoa frag. One of the worms was moving in the second photos. Any idea what they are and if they are a concern?
Lots of mini Feather dusters?
- Thread starter kesuk
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Looks like feather duster to me.
They are a great addition to a tank. If they continue to grow. This means you have a lot of micro life in your aquarium. I have had a whole sump covered with them.
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