P3E1R1I1P3H4Y4T1O1N1S1
21 points
PERIPHYTONS is validvalid
PERIPHYTON,
PERIPHYTON, aquatic organisms which are attached to, or cling to, stems and leaves of rooted plants, rocks, etc.
PERIPHYTON,
PERIPHYTON, aquatic organisms which are attached to, or cling to, stems and leaves of rooted plants, rocks, etc.