Application of Light-Emitting Diode Lights to Bluefin Sea Robin (_Chelidonichthys spinosus_) Catch in Pot Fishery in the South Sea, Korea  
fishing techniques, a relatively small-sized vessel with low fuel consumption is required for pot fishing [8; 9].  
However, compared to gillnet or trawl, pot fishing has a low catch rate. It is, thus, crucial that catch efficiency is improved to ensure profitability for fishery operators [10]. The development of pot fishing techniques has continuously advanced via studies on the reduction in bycatch and the improvement in size selectivity and pot design, as well as in comparing bycatch reductions in pots and other gears [11; 12; 13; 14; 15; 16]. Recently, studies have been conducted on the application of light-emitting diode (LED) lights to the pot as a novel technique to increase catch rates [17; 18].  
With technological advancements, LED lights have been actively applied to fishing gear since the early 2000s, with studies mainly focused on squid jigging. The goals of these studies on the use of LED fish lamps in squid jigging were to improve energy efficiency, promote green growth, and lower carbon emissions, whereby the use of LED lights resulted in an equal catch performance compared to the use of conventional metal halide lamps but lowered energy demands, such as fuel cost [19; 20; 21; 22]. Recently, the scope of the use of artificial LED lights in various fishing gear from gillnet to trawl and stationary gear has been extended to reduce bycatch and enhance catch rates [23; 24; 25; 26]. Similarly, studies in pot fishing on the application of LED lights to improve catch efficiencies have been conducted. The most well-known studies are those on cod (_Gadus morhua_) and snow crabs (_Chionoecetes oilio_) in the Atlantic Ocean. These studies have shown increased catch efficiency at specific wavelengths compared to the use of conventional fishing gear [27; 28; 29]. As such, studies on fishing gear such as the use of pots with artificial light have been conducted with an aim to enhance catch efficiency or to reduce bycatch. In previous studies, LED lights are known to affect the catch efficiency of fishing gear or reduce the bycatch of specific species. Similarly, the application of LED lights is predicted to increase the catch of BSR via either a direct effect on the catch (e.g., phototaxis) of BSR or via an indirect effect on their prey organisms (e.g., attracting and phototaxis) [30; 31; 32; 33; 34; 35].  
This study was based on the results of recent studies on the use of low-powered LED lights in the field of fishery with a previously uninvestigated target--BSR species (_C. spinosus_). By conducting field experiments, the effects of artificial LED lights (red, green, blue, and white) on the catch of BSR were investigated for pot fishing in the coasts of Korea. In contrast to previous conventional studies, this study conducted photometric and integrating sphere analyses to determine the properties of LED lights. Furthermore, the fish stomach contents were analyzed to determine the influence of LED light pots or prey items on the BSR catch between the control and experimental groups referring to the Atlantic cod (_Gadus morhua_) research case. Thus, the application of LED lights in pots was verified as a method to increase pot fishing efficiency, and basic data were obtained for enhancing the profitability of fishery operators.