Little tubes?

[Emsevers]

What are these tube things? They are growing all over the place.

 

[redfishbluefish]

Vermitids! Love them or hate them. I've had them for years. My wrasse keeps them in check.

It's a sessile snail that puts out a sweeper tentacle that could sting corals.

 

[Emsevers]

Vermitids! Love them or hate them. I've had them for years. My wrasse keeps them in check.

So I take it they aren't harmful? My wrasse either hasn't discovered them or doesn't care for them. It's so interesting how things just pop up in the tank that you never knew existed!