Field Guide to Algae - Benthic Diatom
Navicula sp. is a tube-dwelling diatom that is particularly abundant in spring from the high to the lower intertidal zone. The of each diatom, which is a single cell, is made of two silica valves (“shells”); diatoms live in “glass houses.” This diatom often fools experts, because it can look like a filamentous brown alga.
Photos by Sarah Hall.