This article presents results of complex investigations conducted in the autumn 1994 and summer 1995 by the Water Ecology Laboratory of the Institute of Environmental Protection, Branch of Gdansk. The research was a continuation of studies commenced in summer 1992, within the framework project 'Development of a system of protection and restoration of the Gulf of Gdansk biocenosis' (Kruk-Dowgiallo and Ciszewski 1995; Kruk-Dowgiall?o and Dubrawski 1998). The project was financed from the statutory funds of the Institute of Environmental Protection (IEP). The estimation of industrial fish contamination extent was done on the basis of 1992-1994 studies, supervised by Dr Urszula Potajallo within a Project Research required by SRC (Scientific Research Committee) which was realized in the Institute of Marine and Tropical Medicine in Gdynia (Potajallo et al. 1995). The state of coastal sediments state estimation was provided on the basis of seasonal studies carried out in 1995-1996 within a MS thesis experiments performed in (IEP) by Aleksandra Kula, supervised by Dr Rajmund Dubrawski.