The utilization of marine resources has become very important nowadays due to the rapid increase of world population and raw material requirements. The food industry is facing new challenges in food supply for human consumption, seeking new resources as alternatives to terrestrial foods. Marine based food resources are promising candidates for this new challenge. As a protein source for human consumption, terrestrial animal production alone may not be sufficient as a food supply for the world population. Nowadays, studies on the utilization of marine algae as a food resource for human consumption have become an important topic in human nutrition. As an important source of protein, marine algae are not only used as a food for human but also effectively used in a variety of fields from fertilizers to industrial products. In the present study, temporal and spatial changes of the chemical compositions of some red algae distributed in the Strait of Çanakkale (Dardanelles) were investigated. The biochemical analyses (lipid, ash, protein analyses) were carried out seasonally (fall, winter, spring and summer) in duplicate. Significant differences were recorded in results obtained for the species collected in relation to the seasons and stations.