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Research of fish community structure in Panjang Island, Banten Bay has been conducted from October to December 2014 while spring tide. The aim of the research was knowing the fish biodiversity and fish community structure. The fishing method was used push net manually active. The location were at Station 1 (West) with sandy-mud and gravelled substrate and Station 2 (North) with mud-reef substrate. In total, 1770 species were captured (14 families, 16 genera, and 21 species), the most large number were at Station 1 and in November (1.213 and 749 individus). Both stations had a low species diversity index (H-) value (0,705 and 0,807). It supported by a low eveness index or distribution of individuals among species (E) value. Its high dominance index (D) value was due to the predominance of Ambassis gymnocephalus-Chandidae (908), Ambassis buruensis-Chandidae (297), Oryzias javanicus-Adrianichthyidae (265), Chelon sp.-Mugilidae (123), and Gerres sp.-Gerreidae (22) in large numbers.