Microscope ID Pic Help

[BrandoJac]

Any idea what I am dealing with? The smaller brown circles were quite active while the larger oblong ones were static. I am thinking dinos based on visual appearances in the tank but I have no idea what I am doing here, so I want to make sure what I am dealing with before I try more substantial things to rid my tank.

Thanks!

 

[Reef By Steele]

That looks like a textbook photo of Dino’s.

 

[Dan_P]

Any idea what I am dealing with? The smaller brown circles were quite active while the larger oblong ones were static. I am thinking dinos based on visual appearances in the tank but I have no idea what I am doing here, so I want to make sure what I am dealing with before I try more substantial things to rid my tank.

Thanks!

Ostreopsis dinoflagellate. The round cells look like something else.