Abstract Marine algae and seagrasses were researched in the upper infralittoral zone of Adana (Turkish Mediterranean coasts) in this study. 381 algae and 5 seagrasses (Liliopsida) were determined (Total 386 taxa). 27 of them belong to blue-green algae (Cyanophyceae), 204 to red algae [Rhodellophyceae (2), Compsopogonophyceae (2), Bangiophyceae (5), Florideophyceae(195)], 78 to brown algae (Fucophyceae), 72 to green algae [Chlorophyceae (7), Ulvophyceae (18), Trentepohliophyceae (1), Cladophorophyceae (22) Bryopsidophyceae (22), Dasycladophyceae (2)]. Ceramium siliquosum (Kützing) Maggs & Hommersend var. zostericola f. zostericola, C. tenuicorne (Kützing) Waern (Rhodophyceae), Bryopsis adriatica (J. Agardh) Meneghini (Bryopsidophyceae) are given as newly record for the Mediterranean shores of Turkey.