In Mare Balticum each player takes the role of a captain of a fleet of fishing boats. Your task is to catch fish in the choppy waters of the Baltic Sea. Which fish should you try for? The noble salmon, delicious cod, schools of herring, or perhaps the flounders deep in the mud? Or maybe forget about the stinking fish business and focus on collecting beautiful Baltic amber from the water? Whatever decision is taken, captains must also deliver goods to appropriate ports and sell them. Whoever most effectively handles the task and makes a fortune before winter comes and freezes the Baltic waters will be the winner!