The aim of the present study is to compare the fouling communities between the years 1960 and 1999

The present work aims to relate the settlement of marine fouling organisms in three different harbours in Alexandria city which present a wide range of ecological/environmental variations. Theses are the Abu Qir, Eastern and El-Dekheila harbours. Monthly samples of marine fouling were collected from the three harbours by using white roughened polystyrene test panels (12.5x12.5 cm), as well as physicochemical, chemical and other biological data. Results were treated with multivariate statistical analysis (PCA). At the Abu Qir harbour, it was found that water temperature and salinity are the most important environmental factors controlling the temporal distribution of total fouling density, whereas water temperature and chlorophyll a are the most significant environmental factors controlling the total biomass. At the Eastern harbour it was demonstrated that ammonia and phosphate are the most significant environmental factors controlling the temporal distribution and total biomass of fouling organisms. Concerning El-Dekheila harbour, the total density and total biomass of fouling organisms were inversely correlated with the total zooplankton.

The fouling erect Bryozoa settled on polystyrene test panels immersed half a meter deep in the water of Abu Qir Harbour, the Eastern Harbour and El-Dekheila Harbour were studied. The present study yields 5 species of erect bryozoa. These areAmathia pruvoti, Zoobotryon verticillatum, Bowerbankia gracilis,Bugula neritina and Bugula stolonifera. The first three ones pertain to 3 genera of the family Vesiculariidae belonging to suborder the Stolonifera; while the other two species affiliate to the genus Bugula belonging to the family Bugulidae of suborder Anasca. The present record of Amathia pruvoti is the first from the Egyptian Mediterranean waters. A re-description, supplied with full structural illustrations of the recorded species is given. Moreover, the temporal and spatial distributions of the species recorded are encountered.

Polystyrene test panels immersed half a meter deep in the water were used to collect the fouling,encrusting Bryozoa at three harbours in Alexandria city. These were Abu Qir Harbour, the Eastern Harbourand El-Dekheila Harbour. Four species of encrusting bryozoa are recorded in the present study.These are Conopeum reticulum, Watersipora subtorquata, Cryptosula pallasiana and Schizoporella errata.The first species is affiliated to the Membraniporidae family , belonging to the suborder Anasca whilethe other three species are affiliated to the Watersiporidae, Cryptosulidae and Schizoporellidae familiesrespectively. These families belong to the suborder Ascophora. A re-description, supplied with full structuralillustrations of the recorded species is given. Moreover, the temporal and spatial distributions of thespecies recorded are provided