What is this, and on my fish

[Royl14]

So I started ro see those spider on my glass , I know my fish got something, I do not know what anymore...
He is eating well , freaks out sometimes but idk if it's velvet or ich
Will have qt tank next week and I'm freshwater dip him every 2 days until then.please help me identify both things

 

[Reefkeepers Archive]

On the glass is a hydroid, this species is normally harmless and goes away in a few weeks

 

[Reefkeepers Archive]

Though you have a more pressing issue here... #fishmedic @Jay Hemdal @vetteguy53081. What are your parameters? What symptoms has the fish been showing?

OP can you edit this thread so it's in fish disease and treatment instead of hitchhiker and critter ID and/or post another thread with this fish in that section?

 

[Royl14]

Did it, but I can't find the option to delete this post from my phone

 

[Idech]

Your fish is very thin and looks very ill. I hope you can help it.

 

[Jay Hemdal Verified Community Expert]

There is another thread about this fish.

 

[Reefkeepers Archive]

There is another thread about this fish.

Yeah, that was made after I tagged you...

 

[vetteguy53081]

So I started ro see those spider on my glass , I know my fish got something, I do not know what anymore...
He is eating well , freaks out sometimes but idk if it's velvet or ich
Will have qt tank next week and I'm freshwater dip him every 2 days until then.please help me identify both things

Other thread answered. Please refrain from cross posting which takes away from others who too are seeking answers to their issue. The thing you say is a spider ais a hydroid/hydrozoa and best removed with a plastic scraper into a net and discarded