How to Tell Apart Mini-guide << view all mini guides S E A W E E D Membranoptera fabriciana Winged Weed Euthora cristata Crested Spermwell 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 2 by Jordan Chalfant Mini Guide Common Brown Seaweed Blades: Part 3 by Jordan Chalfant Mini Guide Leathesia marina vs. Colpomenia peregrina by Jordan Chalfant