Abstract
The northern region of Sekotong Bay is well known for its secluded, and it potentially provides a unique habitat for the coral reef ecosystem. There are only two islets located in that outermost area, namely Gili Rengit and Gili Layar. This study aims to describe the reef fish community structure in both islands. The study was conducted in the northern and southern parts of each islet using UVC (Underwater Visual Census) method along a 50×5 m belt transect. A total of 64 species of reef fish from 18 families were identified. The majority of fish found were resident obligate and dwellers. Moderate diversity index, as well as the low presence of indicator and targeted fish species, indicates the susceptible stability of reef fish community in the outer islet of Sekotong Bay.
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