Cladophora socialis is a species of green algae in the family Cladophoraceae. It is a filamentous marine alga that grows attached to hard substrates in coastal environments.
Cladophora socialis forms branched, filamentous thalli composed of multinucleate cells, a defining characteristic of the genus Cladophora. The filaments may occur as loose tufts or dense mats attached to substrates. Growth occurs by apical cell division, and the cell walls are primarily composed of cellulose.
This species occurs in marine environments, typically in shallow coastal waters. It grows attached to hard substrates such as rocks, shells, and artificial surfaces, and may also occur epiphytically on other algae.
Cladophora socialis has been recorded from marine environments worldwide, including tropical and temperate regions of the Atlantic Ocean and Pacific Ocean.
The species was first described in 1849 by the German phycologist Friedrich Traugott Kützing. It is one of many species within the genus Cladophora, a group of green algae known for their filamentous morphology and wide ecological distribution.