Dino ID again please

[CoralClasher]

They look smaller than ostreopsis and a little lighter in color on the glass in refugium. Sand still looks clean but I just noticed this stuff two days ago.

 

[road_runner]

They look smaller than ostreopsis and a little lighter in color on the glass in refugium. Sand still looks clean but I just noticed this stuff two days ago.

Are they moving around and bumping each other?
It does look like dino..

 

[CoralClasher]

Yes they are moving just like the ostreopsis that I had last time.