Description: Thick colonies throughout water or as surface scum, grey green to blue-green color, can form pea soup looking surface scums, toxin and taste/odor producer.
Warning: TOXIN PRODUCER!
Similar Similar Scum Forming Blue-green Algae: Woronichinia, Coelosphaerium
Description: Can have an earthy musty smell, looks like grass clippings as surface scum or throughout water; toxin and taste/odor producer.
Similar Mat Forming Blue-green Algae: Planktothrix (not as structured bundles); Dolichospermum (Anabaena)