Odd, tiny Star like creature on my glass - what is it?

[BoBiddly]

I was cleaning my glass and noticed an abundance of these small Star like critters on my glass. They’re tiny - like a thin point to a lead pencil. To my eye they look like 4 pointed or Star shaped, but my phone was able to take a pretty detailed photo. Here are two different ones.

‍ curious what they are.

 

[BoBiddly]

I did find one asterina starfish about 2 weeks ago, but feel like I noticed these things before. I scooped out the asterina just bc of what I had heard about them. Although, it sounds as though it likely wasn’t the coral gobbling version (more white). Just an FYI on the info since they kinda look starfish like.

 

[TurboTang]

Hydroid - not good

 

[Fish Styx]

It is a hydroid. They generally resolve on their own.

 

[TheDuude]

+1 on hydroids. I had a small bloom when my tank was younger. Didn't last long and didn't seem to bother anything.

 

[Corn674]

Hydroids pesky little things kill it while you can but alot of fresh tanks get them eventually

 

[BoBiddly]

That makes sense bc I’ve seen hydroids in a different phase for about a month and a half. I’ve been trying to manually remove and dip in hydrogen peroxide. Wish me luck.

Eyeing a copperband butterfly fish and maybe blue sapphire damsel to help w pest removal. At least per the advice from my LFS.

 

[AydenLincoln]

Hydroid very common in new tanks and will die-off on their own especially this kind!