Who are these snowflake looking guys?

[Hunna]

Noticed these popping up in my little macro algae tank. Haven’t noticed any in my other tanks yet. I included ones with copepods in the picture for a size reference. I’ve been squishing them with my finger and pulling them out for now, until I know what they are.

 

[ecoreefguy]

Hydroids

 

[chaples55]

These specifically are often referred to as hydroid jellyfish. I've had them before and didn't experience any negative effects. They eventually disappeared on their own

 

[Hunna]

These specifically are often referred to as hydroid jellyfish. I've had them before and didn't experience any negative effects. They eventually disappeared on their own

That’s good to know. Some must have come in with the macro algaes I bought or traded for recently, as they are only in that little tank. They don’t seem to be bothering anything, but I’ll keep removing them every few days whenever I clean the acrylic.