Are these Hydroid Jellyfish?

[michaelabellz]

 

[JGT]

Yes.

 

[SHNICI]

yep, they look like

 

[vetteguy53081]

Simply scrape off into a net using edge of credit card. They can sting nearby coral if they drop into the rocks which they eventually do
Hydroids typically bloom due to an abundance of small foods suspended and particularly like brine shrimp. Starving them is best way to rid of them

 

[michaelabellz]

Simply scrape off into a net using edge of credit card. They can sting nearby coral if they drop into the rocks which they eventually do
Hydroids typically bloom due to an abundance of small foods suspended and particularly like brine shrimp. Starving them is best way to rid of them

So I shouldn’t just leave them? I read a few threads that said they shouldn’t be a problem and will die off soon.

 

[Sleeping Giant]

They'll be fine

 

[SHNICI]

So I shouldn’t just leave them? I read a few threads that said they shouldn’t be a problem and will die off soon.

some will die off, but sumoltime they can disturb your corals, and if they find good spots to feed them self, they can multiply.
Dat mention @vetteguy53081 Ithink

 

[vetteguy53081]

So I shouldn’t just leave them? I read a few threads that said they shouldn’t be a problem and will die off soon.

Question is: Do you want to take that chance? Like aptasia, given the opportunity, they will multiply. I personally would removed with edge of a credit card into a net and discard. There are no fish that eat them

 

[SHNICI]

Question is: Do you want to take that chance? Like aptasia, given the opportunity, they will multiply. I personally would removed with edge of a credit card into a net and discard. There are no fish that eat them

That's correct!
Only few nudibranchs (a bit rare and expensive) will feed on them.