An updated compilation of marine algae for Inhaca Island, Mozambique i
s provided. The list comprises 205 species and infraspecific taxa (64
Chlorophyta, 23 Phaeophyta and 118 Rhodophyta). Nineteen of the seawee
ds (9% of all records) have recently been placed into synonymy. The mo
st common orders are Cladophorales (including Siphonocladales), Cauler
pales, Gigartinales and Rhodymeniales. A R+C/p, ratio of 7.91 indicate
s strongly the presence of a tropical seaweed flora.