Not sure if these are Hydroids

[Luckyduck]

Hey guys I want to make sure these are a worm. Maybe a type of Hydroid? I'm 99% sure they are. The rocks they came in on from were in a basement sump with so light I'm sure they aren't a clove or gorgonian. They have been multiplying at a steady rate. I have tried killing them off with a small amount of Aiptasia-X, it works but it's impossible to get them all and they come back. They're invading and making my Zoas very unhappy. I have seen them occasionally floating around and they do kind of wiggle through the water colum. I want to try a treatment with Fenbendazole. But I want to be certain it is a colonial worm before I dose because I do have a few tube worms that I know I will lose if I treat. I'm not worried about losing those but I don't want to kill them for nothing. Also if anyone has used Fenbendazole do I need to take my inverts out? I don't think so I just want to be sure. I will be doing more research on Fenbendazole today as well.

I tried to get as clear of pictures as possible. This is in my 1 gallon mini tank so I've had to zoom quite a bit.

 

[ISpeakForTheSeas]

Those are definitely an invasive octocoral - each polyp has 8 limbs branching off in a radially symmetric pattern.

I'd suggest treating it like invasive clove polyps.

 

[Luckyduck]

Those are definitely an invasive octocoral - each polyp has 8 limbs branching off in a radially symmetric pattern.

I'd suggest treating it like invasive clove polyps.

Thank you for the ID. And how would I treat an invasive colve polyp?

 

[vetteguy53081]

Hey guys I want to make sure these are a worm. Maybe a type of Hydroid? I'm 99% sure they are. The rocks they came in on from were in a basement sump with so light I'm sure they aren't a clove or gorgonian. They have been multiplying at a steady rate. I have tried killing them off with a small amount of Aiptasia-X, it works but it's impossible to get them all and they come back. They're invading and making my Zoas very unhappy. I have seen them occasionally floating around and they do kind of wiggle through the water colum. I want to try a treatment with Fenbendazole. But I want to be certain it is a colonial worm before I dose because I do have a few tube worms that I know I will lose if I treat. I'm not worried about losing those but I don't want to kill them for nothing. Also if anyone has used Fenbendazole do I need to take my inverts out? I don't think so I just want to be sure. I will be doing more research on Fenbendazole today as well.

I tried to get as clear of pictures as possible. This is in my 1 gallon mini tank so I've had to zoom quite a bit.

Looks like anthellia xenia which can grow out of control

 

[ISpeakForTheSeas]

Thank you for the ID. And how would I treat an invasive colve polyp?

The only solutions I've heard for blue clove polyps aren't reef safe (they might kill off other things in the tank), but the most common treatment I've heard is Fenbendazole. Someone else used Lugol's Iodine, but they also lost some corals from that. Some people say kalk paste or super glue may work, but I haven't seen many people reporting success with it. The links below may help:

Invasive purple clove polyps

Does anyone know how to kill off invasive clove polyps? They’re starting to spread and envelop my acans and I don’t want them swallowing my garden.

www.reef2reef.com

Eliminating Blue Clove Polyps with Fenbendazole

A few years ago, I purchased a rock that had some beautiful Space Monster zoas on it. It also had some Blue Clove Polyp on it as well. I saw the BCP, I knew it was there, I really didn't worry about it at all because I had no idea what it could become. Fast forward....its now everywhere. Its...

www.reef2reef.com

I can't find the post, but I recently read someone saying they had a particularly invasive brown strain of clove polyps that survived the fenbendazole treatment too.