Any Saltys Want To Id These?

[techen]

 
Am shocked my marco setting on my phone got these
 
Anyway, There's quite a few on the glass. Maybe a bristle star?

 

[techen]

Okay, Theres a lot of them.
 

 

[Donya]

Looks to be Staurocladia or a related species. They'll bloom for a bit and then vanish one day.

 

[techen]

Are they someone to panic about? I was cleaning the glass and saw tons of these, On every panel of glass.
 
And could they be hydroids?

 

[BigTuna]

I've had similar creatures lurking in my live rocks.  I've never thought much of them, but I'm wondering if they would harm my turbo snails? 

 

[techen]

Wouldn't the turbos just eat them? I've not seen any on my rocks. Just my glass.

 

[Donya]

They're hydroid jellies. Another common one is Cladonema, which actually spend time as a free-swimming little jelly (pretty cool really; I tried to cultivate them at one point). I don't know of anything that will eat them, but they don't last long. It's possible they might irritate some corals if they covered one, but it's never a problem I've seen so I presume they're pretty weak in that regard and don't like landing on other Coelenterates. They mainly go for the glass like you've seen. They will make it hard to see into the tank for a while and then disappear; just one of those marine things to wait out patiently.

 

[techen]

I was researching it and what Donya said seems to be the norm. They just die out, So am quite thankful they'll not overrun my tank. Just another phase in marine keeping.
 
I'll keep a eye on them and see if they keep up or die off.