Avrainvillea is a genus of green algae in the family Dichotomosiphonaceae.

[1] Avrainvillea is a green siphonous marine macroalgal species.

[2] In the tropical species the dichotomously and branched filaments are generally united.

[2] Avrainvillea erecta was reported to have strong hemagglutination activity.

[4] In addition, the chloroform fraction of a methanol extract of Avrainvillea erecta exhibited hydrogen peroxide scavenging activity as strong as that shown by gallic acid.