Caulerpa is a genus of seaweeds in the family Caulerpaceae (among the green algae). They are unusual because they consist of only one cell with many nuclei, making them among the biggest single cells in the world. A species in the Mediterranean can have a stolon more than 3 m long, with up to 200 fronds. This species can be invasive from time to time.
Referring to its thalli's crawling habit, the name means 'stem (that) creeps', from the Ancient Greek kaulos ( ‘stalk’) and herpo (‘to creep’).
This Caulerpa with flattened disks was observed on lagoon, pinnacle and seaward reefs.
Caulerpa nummelaria Harvey ex J. Agardh (misspelling)
Caulerpa peltata f. exigua (Weber-van Bosse) Reinke, 1900 (synonym)
Caulerpa peltata var. exigua Weber-van Bosse, 1898
Caulerpa peltata var. nummularia (Harvey ex J.Agardh) Weber-van Bosse, 1898 (synonym)
Caulerpa peltata var. stellata (Harvey ex J.Agardh) Weber-van Bosse, 1898
Caulerpa racemosa var. exigua (Weber-van Bosse) Eubank, 1946 (synonym)
Caulerpa racemosa var. nummularia (Harvey ex J.Agardh) D.Dixit, 1926 (synonym)
Caulerpa stellata Harvey ex J.Agardh, 1873 (synonym)