Could anyone help ID what are those? It’s from a area that algea form like a huge web and hold a large amount of sand when I suck them up. Also got some pizza diatom at the same region. They are not moving under the scope tho( first four photo)
And from a another area that the sand is covered with brown stuff, they are not webbed together and could be easily suck up just at that point by turkey Baster . I saw some fast moving organisms under the scope( last video and the following two photos)
Thank you so much for help in advance!!!

And from a another area that the sand is covered with brown stuff, they are not webbed together and could be easily suck up just at that point by turkey Baster . I saw some fast moving organisms under the scope( last video and the following two photos)
Thank you so much for help in advance!!!



