Help does anyone know what these are?

[Lololo]

I have had them for a week or so now seems harmless but they stick to glass I’ll clean them off and few hours or so they back on glass they very tiny white little web looking thing shape of like a star weird if anyone knows let me knows thanks

 

[emilio365]

They look like Hydroid jellyfish.

https://firsttimemarinekeeper.com/2019/06/04/critter-identification-hydroid-jellyfish/amp/

 

[F i s h y]

Hydroids

 

[Lololo]

Hydroids

Thank you guess with time it will go away

 

[Lololo]

They look like Hydroid jellyfish.

https://firsttimemarinekeeper.com/2019/06/04/critter-identification-hydroid-jellyfish/amp/

Thank you this was very helpful least I know all I can do is wait for them to vanish

 

[Flippers4pups]

They are harmless.