Identify what I am dealing with on my sandbed

[buruskeee]

Few more images I was able to get. This is also at 400X

These are definitely Dinos. Looks like SCA to me (Small Cell Amphidinium). Mack’s guide is the best out there. Download the PDF.

 

[brianfarm6767]

400x

These are definitely Dinos. Looks like SCA to me (Small Cell Amphidinium). Mack’s guide is the best out there. Download the PDF.

 

[buruskeee]

A lot of those cells look dino shaped and you can kind of make out the “beak” on the front of them. I would think they are large cell from these slides but still not fully clear.

If the sand bed is 95% clean in the morning before lights on then that pretty much concludes it with the shape of those cells and the behavior. Dinos will go into the sand at night and come back to the surface when lights come on.

Because of how big the gap is in the beak, they’re small cell. Large cel have a slit for their beak instead of the bigger gap.