Unidentified Floating Object- UFO

[LetItReef]

Hello- any idea what this is? I see it on our standard 29g. It is brown, swims like a Jelly fish? Pardon the mobile video, was trying to catch up as it swims. Thanks! https://youtu.be/SEb_vXURR9E

 

[kschweer]

Possibly a hydroid??

If it looks like this than its a hydroid.

 

[LetItReef]

Hard to tell. I will have to take a closer look when it shows up again. Thanks.

 

[ca1ore]

Mini brittle stars go for a swim at night in my tank. Cannot tell from the video, but maybe that?