Microorganism doodle. Euglena is a single-celled protist that lives in fresh water and uses chloroplasts to photosynthesize. Watercolor with black ink and white ink, in Moleskine sketchbook. 4″ x 4″. Categories: drawingspaintings Tags: animalsinkwatercolor Leave a Reply Cancel reply Your email address will not be published. Required fields are marked * Name * Email * Website What's on your mind?