In 2003, the Otoshi-ami-type fishing gear was designed with a 250-m leader net and a main net system that was 45 m wide and 140 m long and consisted of a playground and chamber trap. The initial net design was modified in 2004 to be 20 m wide and 155 m long and was installed at a depth of 13 m in the coastal waters of Mae Rumpheung beach, on the cast side of the Gulf of Thailand. At the end of 2006, a second set-net was installed at a location in the coastal waters off Mae Rumpheung beach at a depth of 14 m, approximately 1 km distant in a northwestern direction from the first set-net unit (see Fig. 1). The local fishers were organized to make a group with a committee system, both for the fishing operation and management activities. The estimated cost of the one set-net unit gear was 500,000 Baht (16,590 USD, when the exchange rate was 1 USD = 30.14 Thai Baht, according to http://themoneyconverter.com/THB/USD.aspx), with costs mitigated by partially using second-hand local materials for constructing the gear. The gear was constructed by 45 fishermen, working alternately as teams of 16 fishermen, and was completed within 2 months through volunteer-based participation of the community members. The gear installation work was done in 2 weeks in October 2003 with the assistance of MV. PLALUNG 1 (35 GT. 17.5 m LOA, 270 HP) from the SEAFDEC Traning Department [13,15] to facilitate safe and efficient working conditions. The sea conditions during the monsoon season in this area along the east side of the Gulf of Thailand are generally quite severe. For this reason, the fishing season is from October to April each year [15]. The hauling operation is performed every 2 days during the fishing season. The catch is preserved in plastic container boxes with iced seawater to keep it fresh and of high quality and sold directly to local customers and dealers from their beach fish shop, which is managed by the fishers' group themselves.