your "algae" looks like ...

it may be a cyclodextrin tubule .
I grow them everywhere..skin, scalp, urine, stool..
























..fiber in the process of being formed in a urine drop.
Note how the "chunks" of gel are being set up in
individual "compartments"..very much like what is seen
in the completed fibers ..a tubule made up of compartments;
each with a 'payload" of some sort.

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