Help! What are these??

[gassdoc]

I turned on full lights today to inspect my tank and noticed these little white things on the rocks and walls of the aquarium. Anybody know what these are? Haven’t really seen them before.

 

[WalkerLovesTheOcean]

It's very hard to tell from the photo, but they look like baby snails. Are they moving?

 

[gassdoc]

It's very hard to tell from the photo, but they look like baby snails. Are they moving?

It's very hard to tell from the photo, but they look like baby snails. Are they moving?

They do not appear to be moving

 

[Solo McReefer]

Those are those glass sponges, harmless, and some say will "filter your water"

Move them to your fuge

Or discard them, or leave them

I can't remember the name just offhand. It will come to me

 

[WalkerLovesTheOcean]

They don't appear to be sponges. OP, you're sure they're stationary?

 

[Formulator]

Definitely a sponge as others suggested. My sump and overflow are full of the same ones.

 

[Goaway]

Collonista snails

 

[JAS927]

Not sponges…they are spiral shelled

 

[cooltowncorals]

Look like snails

 

[Solo McReefer]

Those are those glass sponges, harmless, and some say will "filter your water"

Move them to your fuge

Or discard them, or leave them

I can't remember the name just offhand. It will come to me

Pineapple sponges. Was what I was thinking.

Upon closer inspection, they look like shells of a sort

 

[Cell]

Pineapple sponges are pretty unmistakable. Some of these look very snail shell like. Just pull one out and get a better pic.

 

[Gumbies R Us]

Snails of some sort, hard to tell from the distance

 

[rhitee93]

google "spirorbid worms" and see if that matches what you have

 

[gassdoc]

google "spirorbid worms" and see if that matches what you have

They are not spiraled, Do not look like spirobid worms

 

[WalkerLovesTheOcean]

They are not spiraled, Do not look like spirobid worms

You sure? I can see clearly spiraled shells in the photo. Look up collonista snails as mentioned above, and see if they match.

 

[NanoNana]

Collonistas.

 

[ISpeakForTheSeas]

Agreed with Collonista snails or close relative - CUC that reproduces freely (they may get into equipment too though, so some people report having to cover openings in their equipment to prevent issues that way).

 

[vetteguy53081]

I turned on full lights today to inspect my tank and noticed these little white things on the rocks and walls of the aquarium. Anybody know what these are? Haven’t really seen them before.

Looks to be spirobid worms which feed off algae. I scrape off when I see them

 

[TokenReefer]

Aiptasia

 

[WalkerLovesTheOcean]

Aiptasia

I do see an aiptasia but I don't think that's what OP is talking about.