What is this?

[fish wrangler]

I have these white sac looking things on some of my rock, inside my skimmer, in the sump, and in the over flow. At first I thought they were stomatella snail egg sacs, but google didn't support that.

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[54seaweed]

I see them in all my skimmers never thought anything of them , never seen anything come from them so I just never pay no mind , but now looking in my skimmers there seems to be a bunch of snails that shouldn't be , they have no way to get were they are at so they must have been egg sacks , 2x a year I do have snail populations grow tons of baby nerites , but that's always after I replenish the snails many say snails surviving reproduction in a closed system is 0 to nill I disagree I always see baby snails and they seem to survive, couldn't say 100% those sacks are eggs but looking into my skimmers now really makes me wonder

 

[Sniperhank]

All I see are pineapple sponges and the filter feeding tube worms that I can't recall the name of. They faded away in my tank after several months. They pointed toward excess food in my water column until I got it under control, when there are a ton of them.


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[fish wrangler]

I don't have nerites, but I do have some astrea snails. I'm just suprised the things got to the skimmer. Pre sponge in the overflow and then a filter floss pad on top of the sump seems hard to get through.

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[54seaweed]

this is a nerite snail egg sack looks almost like what I see in your skimmer

could also pass as a pineapple sponge

 

[fish wrangler]

Both of those look sk close to what I have. I'm leaning towards the sponge because I have never had nerites in this tank.

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[54seaweed]

all it takes is a egg on a frag plug or even on a rock so tiny could go undetected nothings impossible in saltwater

 

[Reefing Madness]

Pineapple Sponge
and the white curly looking thing next to them are called Pileolaria

 

[fish wrangler]

I'll have to keep my eye out of any nerites now. If they are eggs or sponges they don't seem harmful so I'm happy.

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[Reefing Madness]

They are not Nerite Snail eggs.

Pineapple Sponge


Nerite Snail Eggs