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What Are These?


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Hello All,
 
I have a fry tank full of EBAs being grown out. It's about 2 weeks old. About 2 days ago, small, white specs began appearing all over the glass. They now cover every square inch of the inside of the tank. 
 
These are the white things on the glass:
 
whitestuff.JPG.ef1df54db4f1d60c26b8ed6843424cbb.JPG
 
These are the fry:
 
oldfry.JPG.11f579d85a56efcc54dbf9079e72ac58.JPG
 
These are the parents:
 
DSC_0011sm.jpg.837a241c944cf065fa30ff6b75726e47.jpg
 
Not knowing if I was looking at plant or animal, I put them under a microscope, and it seems they are alive and have motor ability. It appears they have tentacles and try to snatch unwitting passerby microbes.  They look a little like some anemones. 
 
This 1-minute video of them is recorded at 400X:
 
Does anyone know what they are?  Thanks for looking! 
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On 3/4/2024 at 10:07 PM, doktor zhivago said:

The trumpet shaped objects are stentors

Thank you!  I've always wondered what these things are.  Seems like I don't see them much in tanks that have glass cleaners.  But they seem to pop up in anything that doesn't have them.  

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