Weird jellyfish type things..?

[00youknowit00]

So I was taking the xenia out of my 3g(slightly neglected) tank and all of a sudden noticed these jellyfish like things jumping around at the front glass.. I tried to take pictures and a video but its really hard to get it to focus.. But ill post what I got.

So anyone know what these are? If they're harmful? Cause I was gonna move the xenia to my 20H but don't wanna put these things in my 20 if they're bad.. Should I do a freshwater dip?

Thanks!

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[00youknowit00]

Don't know why the pictures didn't show up.. Again they're horrible and possibly won't help but here they are..

 

[54seaweed]

kind of look like baby shrimp
when there small they kind of look like jelly fish till they develop there exoskeletons

 

[00youknowit00]

kind of look like baby mysiss shrimp

Ehh from what google showed they don't look the same..

 

[00youknowit00]

This is them!!



From this site: http://www.wetwebmedia.com/jellyidfaqs.htm

So they seem harmless..

 

[54seaweed]

that would be a jelly but
your vid shows them dancing jelly's don't dance like that
heres mysiss larvae see how they dance around

Mysid larvae - YouTube

larvae looks like jelly when small also

 

[00youknowit00]

that would be a jelly but
your vid shows them dancing jelly's don't dance like that
heres mysiss larvae see how they dance around

Mysid larvae - YouTube

larvae looks like jelly when small also

Maybe so, but they do exactly what that article said and look exactly like the red picture..

 

[AbsoluteFaye]

Are they hydroids?

 

[00youknowit00]

Are they hydroids?

They don't look quite the same..

They are EXACTLY these things:

 

[Sniperhank]

Hydroids.
Google Image Result for http://cdn.saltwaterfish.com/3/38/38815b3c_70677hydroid.jpeg

 

[00youknowit00]

Hydroids.
Google Image Result for http://cdn.saltwaterfish.com/3/38/38815b3c_70677hydroid.jpeg

Okay, well just me being on the safe side, if I did a 30sec freshwater dip on the xenia that I'm moving to my other tank, would that kill them if they happened to be on the coral?

 

[00youknowit00]

Finally got a good picture. General consensus still Hydroids?

 

[AbsoluteFaye]

Definitely. Hydroids have different stages of growth. You can look it up. It's like a polyp stage then the snowflake thing then the jellyfish. I think. Your tank has been up for a while? Because I think I read that hydroids usually come in a cycle but I might be wrong.

 

[00youknowit00]

Definitely. Hydroids have different stages of growth. You can look it up. It's like a polyp stage then the snowflake thing then the jellyfish. I think. Your tank has been up for a while? Because I think I read that hydroids usually come in a cycle but I might be wrong.

Okay then they aren't any harm?

And yeah it has, I've just slowly taken the stuff out of it and put it in other tanks.. All thats left is rock and some Xenia..

 

[AbsoluteFaye]

I'd look it up but I'm pretty sure they end up dying off.

 

[00youknowit00]

I'd look it up but I'm pretty sure they end up dying off.

I did, they're harmless. Thanks!

 

[Ronin77]

Those are crazy looking, when I had my nano I would always have little jelly fish show up. They would range from brown, blue, white, red and yellow. It was really cool and weird