Solvin Zankl / Red algae (Chylocaldia verticillata) from Roscoff, France, April. Preserved specimen.

Solvin Zankl / Red algae (Chylocladia verticillata) from Roscoff, France, April. Preserved specimen.

Solvin Zankl / Intertidal rocks covered in seaweeds, including brown algae: Toothed wrack (Fucus serratus), and Thongweed (Himanthalia elongata), red algae: left Chylocladia verticillata, middle Pepper Dulse (Osmu...

David Hall / The blue-purple iridescence of this algal seaweed (Fauchea laciniata) is the result of light reflecting off of gland cells embedded in its surface layer. Barkley Sound, Vancouver Island, British Colum...