How to Tell Apart Mini-guide << view all mini guides S E A W E E D Download PDF Ectocarpus spp. Elachista spp. Pylaiella spp. Spongonema sp. Tube-forming Diatoms Text by Jordan Chalfant Photos by Jordan Chalfant Design by Celeste Mittelhauser Share Related Mini Guides Mini Guide Common Brown Seaweed Blades: Part 4 by Jordan Chalfant Mini Guide Dumontia contorta & Devaleraea ramentacea by Jordan Chalfant Mini Guide Chondrus crispus vs. Mastocarpus stellatus by Jordan Chalfant