Nine species of benthic marine algae are reported from the Caribbean island of Curaçao for the first time: Chlorophyta: Derbesia marina and Trichosolen longipedicellata; Phaeophyta: Ectocarpus rhodochortonoides, Feldmannia elachistaeformis, Hecatonema floridanum, Herponema tortugense and Sphacelaria novae-hollandiae; •; Rhodophyta: Polysiphonia scopulorum and Polysiphonia sphaerocarpa. The Curaçao algal flora, with at present about 350 species recorded with reasonable certainty, equals some of the richest known areas in the Caribbean.