Dinos? Coccolithophores? Both??

[phigene]

First image shows how it presents in the tank. Second image shows the smaller cells up close, and the last 2 show how it typically looks on the microscope. The smaller spherical cells dont move. The larger ones move like an inchworm, stretching and collapsing their bodies. I dont see any beaks, but the large ones do looks sort of dinoish, and it certainly presents that way in the tank. But none of the classic dinos match these guys.

 

[mcarroll]

chrysophytes?

 

[phigene]

chrysophytes?

Oh I think you might be right.