The aim of this study is to identify whether there are differences in catch per unit effort (CPUE) to harvest Rapa whelk using different pots, soak times, depths and seasons. The surveys were conducted monthly off Trabzon city coast in the Southern Black Sea from April 2006 to February 2007. Whelk pot type 1 was the most effective relative to other pot types used in this study. The mean CPUE increased with increasing soak time. The most abundant catch was at a depth of 10 m in the summer. Approximately 98% of the total catch in pots was composed of target species (whelk), and roughly 2% was by-catch. The major by-catches in pots were crabs and goby fish.