Help with Dino Identification

[JustinK2]

Hey everyone- I'm trying to help my son ID what kind of dinos he has in his IM Lagoon 25G. Took this video today using a pretty inexpensive microscope, so not sure if it's sufficient for ID'ing. Let me know if you think you can ID from it. Thanks!

 

[taricha]

it's either prorocentrum or large cell amphidinium (I lean LCA) , but the detail near the front of the cell is too small to tell for sure.