is widely cultivated as a raw source of carrageenan, and other species are used, as well. Several Kappaphycus are invasive species.

Species

The following species are recognised in the genus cc:
*Kappaphycus alvarezii (Doty) Doty ex P.C.Silva, 1996
*Kappaphycus cottonii (Weber Bosse) Doty ex P.C.Silva, 1996
*Kappaphycus inermis