Sorry I forgot the location.
At the bottom of shallow pools in a freshwater marsh. The piece on the paper towel is 4mm in diameter. Is this a green alga?
female plant cultivated from a sample taken on 27.10.2022
Mag. 400x
Not certain of the ID, though it compares well with Tryblionella specimens observed from New Jersey coastal wetlands (not too far away!), https://www.nj.gov/dep/dsr/publications/Diatom_Flora_of_the_New_Jersey_Coastal_Wetlands_Final%20Report.pdf. Active glider. The composite image catch a roll (around its long axis) of the bottom margin of the diatom toward the viewer, to give a near girdle view in the bottom panel.
Go here for a video of this glider doing a roll https://youtu.be/5aV60iCl0kk
Unknown, I can't identify this algae.
Mag. 400x
A small cell variety of Spondylosium? Uncertain about the genus. Appeared as a long "string of beads" that wound in and out of the detritus; regardless of twists and turns, the bead and string profile did not change.