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 Fucus Spiralis, Fucus visiculosus, & Fucus distichus ssp. edentatus by Jordan Chalfant Mini Guide Acrosiphonia genus vs. Cladophora genus by Jordan Chalfant Mini Guide Vertebrata nigra vs. Polysiphonia stricta by Jordan Chalfant