This is a cyanotype botanical illustration of several specimens of *Corallina elongata* algae. The background is a deep, rich cyan-blue. The algae specimens are rendered in a delicate, pale white, creating a striking contrast against the blue. There are seven distinct algal specimens arranged in a roughly symmetrical pattern. Each specimen is a branching, feathery structure, resembling miniature trees or coral. The branches are delicate and intricate, with numerous fine divisions. The arrangement is reminiscent of a botanical study or a herbarium sheet. At the bottom center of the image, there's a rectangular label with the text 'Corallina elongata' written in a simple, elegant font. The label is also rendered in the same pale white as the algae specimens. The overall aesthetic is vintage and scientific, evoking the style of early botanical illustrations.