Due to the growing consumption of petroleum products, oil pollution is increasingly frequent in aquatic ecosystems. Petroleum hydrocarbons are important pollutants for sea and marine organisms. Many researches about petroleum effects on aquatic systems regards the immediate and short-term toxic effects. The origin of hydrocarbons are either endogenic, which are synthetised by marine organisms or exogenic, due to oil pollution accumulated by marine organisms. This paper evaluates the results of research effects of petroleum hydrocarbons on some algae and plant organisms. The analsysis have been recorded by using total organic carbon (TOC) Fourier transform infrared spectroscopic measurements (FTIR), inductively coupled plasma atomic emission spectroscopy (ICP-AES).