Dino identification please.

[CryptoNautical]

Please help identifying these Dino’s. They rapidly move and zigzag back and forth. Im at a loss I just hope they aren’t large cell. I tried to upload a 10 second video but for some reason it isn’t allowing me.

 

[Dan_P]

Please help identifying these Dino’s. They rapidly move and zigzag back and forth. Im at a loss I just hope they aren’t large cell. I tried to upload a 10 second video but for some reason it isn’t allowing me.

The “beak” visible on some of them indicates an Amphidinium species.