Six species of marine algae are reported from Malaysia for the first time a
nd their characteristic features are described: Hildenbrandia rubra (Sommer
felt) Meneghini (Hildenbrandiales, Hildenbrandiaceae); Grateloupia filicina
(Lamouroux) C. Agardh (Cryptonemiales, Halymeniaceae); Taenioma perpusillu
m (J. Agardh) J. Agardh, Taenioma dotyi Hollenberg and Zellera tawallina Ma
rtens (Ceramiales, Delesseriaceae), and Amansia rhodantha (Harvey) J. Agard
h (Ceramiales, Rhodomelaceae), The occurrence of Taenioma dotyi in Malaysia
n waters is the first report outside the Hawaiian Islands. Amansia rhodanth
a is newly recorded for the Pacific Ocean. The presence of Gelidiella panno
sa (Feldmann) Feldmann et G. Hamel (Gelidiales, Gelidiaceae) in Malaysia is
confirmed.