dino id

I have been battling the dinos for awhile now I am 100 percent sure they are dinos I have done a lot of research but I cant seem to identify which type they are. They do not string out or slime up. They just stay on the sand bed. They clear up at night and come back just as strong the next day...

Which strain is this? 40x magnification. I looked at images of Ostreopsis and Prorocentrum on Google but they look similar to me. Thanks