What are these?

They look like a very tiny mysis shrimp (best desc I can think of) and there's about 15 of them stuck to the glass in the corner drilled section of my tank. They aren't moving around just stuck to the glass.

 

pineapples, they are filter feeders. they are good for your tank

 

Pineapple *sponge*. haha

Don't try eating them.

 

I was thinking a nudibranch.

 

Look like nudi's to me too; I see heads on them. Are they moving or stationary?

 

Stationary. They're stuck on the glass. I just knocked one off and they just float around in my corner drilled section. They don't appear to be swimming at all or any moving parts on them that I can see.

 

Then I'll go with pineapple sponges too.

 

The white ball thing is the pineapple sponge.

If they don't move I doubt they are nudi's. Have you tried taking a turkey baster to them and see if them come off? could just be some detritus stuck there.

 

I used a feeder stick to knock a couple off to see what they would do. They def look like a creature of some sort. I'll take pineapple sponge! If these were a bad thing it would have been the straw that broke the camels (mine) back!

 

Just googled pineapple sponge and that's what they are. Funny the post I read said it's due to bad water. I've been questioning the quality of my RO water from the LFS I've been getting it at. I already started getting it somewhere else, but havent used the new LFS yet. Water change is on Friday.

Thanks for the quick replies!