Dino identification (microscope photo)

[malfist]

Can someone help me identify these guys?

They smell like dinos, they coat mostly the rocks and turf algae in my tank. I'm guessing I have three things here, the smaller green dots are probably chrysophytes, the medium sized ones with the pronounced center dot is maybe Prorocentrum, no idea what the big guys are. Nobody is moving or spinning.

 

[BAMatter]

Maybe Coolia?

 

[malfist]

Maybe Coolia?

I wondered about that, you can clearly see a cyst in the one in the middle. I don't see any movement though and I would have expected it, I also don't see the groove across the cell, but maybe my microscope isn't good enough.

Here's another photo as zoomed in as I can go of those specifically.

 

[BAMatter]

I’d try the Macks Dino FB group if you can’t get a solid ID. They helped me get through a couple infestations after a solid ID.

 

[Rigoberto]

Looks like two types there to me. I agree with you on Prorocentrum.

 

[DaJMasta]

An important component of this is size, so it would be helpful to know at least an approximate one as a frame of reference.

Giving your objective can be a bit helpful, but ideally, take a fine ruler and get an approximate measure of the field of view of your camera on the lowest magnification, then scale it by the difference in objective powers (so, divided by 25 if you measured on a 4x and imaged on a 100x)

Even an approximate range could differentiate between similar looking organisms of noticeably different sizes.