White creature on my tank glass

[xnaz]

Can anyone tell me what this is.

 

[Doh Boy]

Hydroid

 

[JGT]

Hydroid.

 

[Rubberfrog]

Sea monster

They're mostly harmless and will go away with time. They might sting a curious fish.

 

[xnaz]

Are hydroids bad and if so is there a way to get rid of them.

 

[old salt reefer]

Medusa hydroid. Somewhat common in a new tank, don't last long, go away on their own.

 

[xnaz]

Ok cool thanks for everyone’s comments.