[1] Ulothrix is a genus of non-branching filamentous green algae, generally found in fresh and marine water.

Its cells are normally as broad as they are long, and they thrive in the low temperatures of spring and winter.

The genus includes: The plant body consists of unbranched, uniseriate filaments.

Reproduction in Ulothrix takes place by means of vegetative, accidental breaking of the filament[4] asexual and sexual methods.

The common vegetative methods of reproduction are fragmentation and akinete formation.