Can anyone ID microscope pic

[cumbeje]

Took look under microscope. Long stranded brown algae looking mostly on sand. Thought Dino but doesn't move at all. Please identify.

 

[mtfish]

To me it looks like some species of Prorocentrum. Can you get a picture that is focused more on the edges of the cells? FYI, Prorocentrum is a type of dino but you may not see it moving under the scope.