How to Tell Apart Mini-guide << view all mini guides S E A W E E D Vertebrata nigra Polysiphonia stricta Download PDF Text by Jordan Chalfant Photos by Jordan Chalfant Design by Celeste Mittelhauser Share Related Mini Guides Mini Guide Common Brown Seaweed Blades: Part 3 by Jordan Chalfant Mini Guide Acrosiphonia genus vs. Cladophora genus by Jordan Chalfant Mini Guide Membranoptera fabriciana vs. Euthora cristata by Jordan Chalfant