The profitability of the fishing industry rose from 9 to 20% in the years 2007-08 and investments doubled as old vessels were replaced with new ones and gear up-graded, with fishers focusing on value rather than volume of catch. From that date licensed fishers have been allowed to transfer their quotas. Sprat in Skagerrak, Kattegat and the Baltic Sea. Fishing is just one of many activities that take place in the world’s oceans.