Caulerpa subserrata is a species of seaweed in the Caulerpaceae family.
The seaweed has erect fronds that arise from repeating, cylindrically shaped, branching, glabrous surculus and often two or three individuals are found together. It is flat and has a linear or elliptic to oblong shape in outline. The fronds are truncato-obtuse at apex and oval at the base tapering to a very short cylindrical stipe. The fronds are 1to long and 3to wide. It can be simple or branches by proliferations and is serrated with lobes along both margins. The lobes are short, patent and a little curved upward and subalternate.[1]
The species was first formally described by the botanist Kintarô Okamura in 1897 as part of the work On the algae from Ogasawara-jima (Bonin Islands) as published in the Botanical Magazine, Tokyo.
It is found along the coast of the Bonin Islands about 500km (300miles) south of Japan.[2]