Sorry for the bad pic.

[Nano30]

What’s this?

 

[Waters]

Hard to tell for sure from the pic but it looks like an Aiptasia.....in which case you will want to remove it asap.

 

[Nano30]

Thanks!

 

[KJ]

Aiptasia.

 

[Nano30]

I tried to get it but couldn’t, it retracted under the rock. I’ll keep my eyes out for it.

 

[Waters]

I tried to get it but couldn’t, it retracted under the rock. I’ll keep my eyes out for it.

You can put a dab of super glue gel over the hole it is disappearing into if you can see it and get to it.

 

[lapin]

Keep 2 eyes out for it. They do spread like mad under the right conditions. You can use a syringe loaded with warm vinegar or Aiptasia-X and squirt it right down its throat when its open to kill it. If you try and scrape it of a surface, any pieces left behind will grow into new ones.