Clear Tag White Dot At Center Attached to Glass

[JuicyJJuice]

Hello all,

 

I notice yesterday these little clear dots with white centers attached to my glass. When looking at the straight on they look flat, but when looking from the side you can see they look like little clear tags. They are stubborn as they do not easily come off with the Flipper. The tank had been running fowl and has a pistol shrimp, hermit  crab, 2 nassarius snails  and a trochus snail.  

 

Sorry about the poor quality photo, impossible to see them straight on. 

[B Lo]

Could it be an isopod?

[Aurortpa]

Like this?

 

[JuicyJJuice]

[Aurortpa]

Hard to tell...first pic they appear to be weird bubbles lined up (altho I know they arent).

 

Hmm, do they move?  Maybe it’s just residual silicone that splattered on your glass?  

[JuicyJJuice]

They don't move. They are lined up, which makes me think maybe snails eggs. I know it isn't silicone as I inspect my tank quite closely and they haven't always been there. Best description I can think of is a tiny clear skin tag with a white dot in the center.