Drawing on the above, can we evaluate whether reef fisheries in Kotania Bay are more or less balanced in terms of fish exploitation? Rochet et al. (2011) suggested measuring the effects of a size-selectivity curve (which depends on size selection and the community size structure) on species-size diversity. Our result showed the wide range of fish size (shown in Fig. 5) represented multi-species selectivity from the multiple gears used. The high biomass of large fish caught might indicate of large size targeting in the fishery which also shown by the slope of catch size-spectrum. A negative skew of biomass distribution, dominated by fish sizes of less than 30 cm might indicate a high level of productivity of these classes. In comparison to the size spectrum of the fish community in Kotania Bay, the volume of fish harvested in the bay is consistent with the available productivity but is less proportional because large fish (±100 cm) were absent during the census, which nevertheless does not mean that no large fish are available in the community. Limited depth range during underwater visual censuses constrains the observation of large fish. It is premature to answer the above question with the assessment that fishing activities in Kotania Bay suggest a balanced fishery. Given that each species and size is vulnerable to a particular type of fishing gear, an increase in intensity of fishing using a particular gear may impact the ecosystem. The study found that the proportion of fish caught is significantly different for herbivorous and zoobenthivores fishes. Use of other types of gear might allow balanced fisheries to be performed in the bay. With regard to the size-spectrum slope in fisheries management, Garcia et al. (2012) suggested that steepening or flattening of the slope might be an indicator of fishing impact on the reef fish community (also see Graham et al., 2005).