Can you identify?

[Avelino Alicea]

I set up a 3 gallon salt water tank to eventually house yellow clown goby babies. As it's cycling, things are growing on it (good things). Aside from the copepods, can you identify this critter that's evolving on my tank? There are quite a few. These pics are of the same one, one of them obviously with a better closeup. I'm not worried about them, just want to know what they are. Google lens didn't help me. Lol

 

[vetteguy53081]

It’s a hydroid
They represent a jellyfish in description and are capable of stinging nearby coral
Starving them is best way to eliminate them by directing water flow towards them, not at them

 

[Eagle_Steve]

Hydroid jelly fish.

Typically show up in newer tanks and die off in a month to a few months. You can suck them out as you see them if you want.

 

[Avelino Alicea]

Yeah. Took a much closer pic with a macro lens and Google found it right away. Thanks guys! There's nothing on that tank now. It's still cycling, so I'm not worried.