Need Help!!! Never seen this before

[mushrommy]

Getting a bit irrational are we? You people are sensitive.

how about we don't start a fight, please? all of us are trying to help someone.

 

[Goaway]

Theyre yellow polyps and can run wild. I like them but wow- this is an infestation. They are related to zoa and when Fed- Will Spread.
Getting rid of them can be an issue as you will address them head by head, but if you can break rock into pieces, you can sell them as colonies

Dear lord....

 

[markfish194]

I will try my best to remove them with my bare hand, and see if there are any better solution later, Really appreciated.

 

[Goaway]

I will try my best to remove them with my bare hand, and see if there are any better solution later, Really appreciated.

Wear gloves.

 

[mushrommy]

ye, they have palytoxins I think.
good luck!

 

[markfish194]

Wear gloves.

Ok, will do, thx

 

[mushrommy]

Wear gloves.

looking at more pictures, I do think they're hydroids,
look!

 

[Goaway]

looking at more pictures, I do think they're hydroids,
look!

Hes got a weird branching one, I've never encountered. But, there's thousands of hydroids.

 

[mushrommy]

I didn't even know hydroids were pests!

 

[ISpeakForTheSeas]

I agree with hydroids, probably Myrionema amboinense.

Edit: I've heard smothering the hydroids with kalk paste may work, and here are some other threads with suggestions that might be helpful::

Hydroids: a reference to some strategies

Like many of us, I have had problems on and off over the years with Hydroids. The ones that have always given me the most problems are the common ones that almost look like a smaller and darker version of the beginner coral called Yellow Polyps. But the colonial Hydroid is much smaller than...

www.reef2reef.com

Hydroids - How do I eliminate- They have taken over my tank

So I have this stuff that has pretty much taken over my tank and I can't get rid of it. I'm looking for an ID and an eradication plan that is anything short of a total teardown.

www.reef2reef.com

 

[Troylee]

Those are colonial hydroids and bad news! Remove the rocks that are infested and muratic acid wash them..

 

[MoshJosh]

My first thought was yellow polyps, and had I not kept yellow polyps in the past that probably wound have been my guess. That said I am voting hydroid as well.

 

[HB AL]

You really wanna get rid of it really quick pull the rocks and put them in a bucket of freshwater for a few hours then grab your garden hose and blast away the all the dead and put back in your tank. Ive done this before with those, zoas etc. to eradicate as I dont wanna get rid of large rocks. I've acquired a nice mix of rock over the decade's and even have a couple large trash cans full I keep in the garage, luckily I did that with the price of good rock nowadays.

 

[vetteguy53081]

I am back home and after looking on my PC Vs. Phone screen, these are no doubt yellow/brown hydroids.
best removal is usually directing flow at them so they starve as they favor brine shrimp. With this many, your best bet is to cut the stems with a sharp razor blade and net them as you cut them and then follow with treatment of pickle lime made in thick solution over them but do this in steps as lime can raise your alk.

 

[ReefLife_Guy]

My vote is also digitate hydroids based on morphology. While both look similar with their whispy tentacles, yellow polyps (Parazoanthus gracilis) have a thicker stalk and larger central disk while hydroids typically have a very thin stalk and essentially no sort of central disk. For some reason zoa frags are highly susceptible to coming with hydroids (not sure the reasoning for this). From what I have read previously when I had some on a few frags, was to use similar products used for aiptasia removal. For me, I just removed the frag and scrubbed them and then never saw them again. Hydroids are from the Hydrozoa class and so can exist as jelly fish which means they can easily spread around the tank.

 

[HB AL]

The above 2 comments are the reason I like reading stuff like this on reef2reef, even after being in this hobby since I was 15 and now 53 I'm always still learning new things and store it in the memory bank for future use if needed.

 

[jimk60]

Colonial hydroids! The only pest I couldn't eradicate and ended up shutting down a tank and starting over. Good luck you already have a ton.

 

[blaxsun]

They look like some kind of polyp.

 

[ISpeakForTheSeas]

Didn’t realize there was a second thread for this ID - as mentioned in the other thread, hydroids, probably Myrionema amboinense.

 

[Spare time]

They look like some kind of polyp.

I know I have seen these but I can't remember the name lol