Bycatch rates were determined for experimentally-designed bottom trawl, red mullet gillnet and whiting gillnet in the Black Sea off the coast of Turkey. Sampling was performed between January 2010 and July 2011 in the region of Sinop. Bycatch rate was estimated 12 +/- 6.02 % in weight and 10 +/- 5.14 % in number for the experimental gillnet surveys, and 62 +/- 11.16 % in weight and 80 +/- 15.32 % in number for the bottom trawl. The sub-samplings showed that bycatch species belonged to various families and many of them were below the minimum landing size. Some bycatch species were endangered. Considering all these problems, we describe the possible effects in near future if measures are not taken to reduce bycatch and ensure the sustainability of the aquatic living resources.