jelly fish

[FishinInTheDark]

Hydroids don't "mutate" from brine shrimp, but they do frequently hitchike their ways in via brine capsules. They hatch along with the artemia and then get transfered into the tank. Seahorse tanks do have troubles with these for that reason.

 

[castorpollux]

that could be it then, its just some random thing i had heard from someone reputable, and they are always prevelant in seahorse tanks so it seemed somewhat believable, i can't find any info on it on the internet and fishininthedark may have cleared up the reason why.

 

[rich_tilbury]

I had a cassiopia jellyfish appear in my sump shortly after I set up my tank. First spotted as polyps then free floating tiny thing which grew to be around 2-3 cm across. It survived for 9 months then disappeared, presumed dead.

It looked similar to this: http://www.liveaquaria.com/product/scateg.cfm?pCatId=505

 

[an-enemy]

^^^ i looks some what like that but all white and a stem that made it look like a mushroom. it had some tentacles but are really really small.

 

[Pescados]

are there other posts on hydroids with good information?
Can someone whom has search find one of those posts?

 

[jdallred]

Pescados, did you get a chance to read the article I posted on the first page? I think you are going to be hard pressed to find a post that explains the hydroids any better than the article by Dr Ron.

 

[Pescados]

yes I did but still confused???
From another article on the "Staurocladia oahuensis, a.k.a hydrozoan jellyfish" it doesn't mention this as being the free floating stage as mentioned in your article. Also mentions that they are no worry. From reading your article the stinging cells part worried me.
I guess what I want to know is should you be worried of these?

 

[an-enemy]

id like to know that to?

 

[Pescados]

bump then

 

[Pescados]

where you at joe?

 

[jimboreefer]

I have these small hydroid colonies in my tank as well, I only see the medusa stage in my sump though ( low flow area) ~ .05 mm in size. It's got to the point where I'm having to kill some of the colonies due to them encroaching on other corals. The little jellys are cool to look at though

 

[Pescados]

Ok I founfd this...
<No fun... you may want to consider creating a scraper/siphon combination that would allow you to scape off a hydroid and immediately suck it out of the tank. You definitely don't want these floating around the tank. You may need to take more drastic action, I'm sorry to say. Hydroids are a pain - quite literally.>WWM
SO *** guys. 300+ views and no one chimed in the say that above?

 

[Pescados]

this is what I found on wwm...
No fun... you may want to consider creating a scraper/siphon combination that would allow you to scape off a hydroid and immediately suck it out of the tank. You definitely don't want these floating around the tank. You may need to take more drastic action, I'm sorry to say. Hydroids are a pain - quite literally.

 

[jdallred]

Pescados, sorry for not getting back to you sooner. My understanding is the hydroids we typically see in our aquariums are not harmful to humans at any stage of development. When they reach the polyp stage they can spread very quickly and are very harmful to corals. So they are not desired and should be removed if at all possible.

 

[Pescados]

OK... what you are saying this is like trying to get all the flees off a dog, a large dog...

Are you supposed to wait till these lil jellyfish turn into a what not polyp on the rock? Then remove?

But some of these are Gorgonians, so does that mean they could come from a gorgonian? Sea fans?