The Bulgarian town of Kavarna is situated on the coast. It is believed that there is the purest in ecological area, so it is in the Gulf was opened Kaliakrensky farm breeding mussels "Dalboka" ("Deep"). Created in 1993, the farm, its specialization is the cultivation and production of Black Sea mussels Muthilus Gallaprovincialis, clean and suitable for human consumption (per year produced about two or three thousand tons).

Farm "Dalboka" is the largest enterprise of this profile in Bulgaria. It occupies the territory of just under 160 acres and the coast is within five hundred meters. At this point in the water it contains a large amount of plankton, which is crucial for the construction of a farm for breeding mussels. Surrounding area vertical cliffs that lead towards the pebble beach. No structures more on this square there. Farm itself resembles its appearance oil platform, in addition, there were built large sewage treatment plant.

Until the standard value of 4 centimeters mussels grow for about 18 months. These shellfish have a very high nutritional value, nutritionists dubbed mussels source of cheerfulness - they contain specific amino acids, enzymes improve digestion, strengthen the cardiovascular system agents and more than 30 micro-and macro. The Romans in the diet of the wounded soldiers must add mussels to recuperate.

For travelers to the farm for breeding mussels organized excursions. Everyone will be able to try the mussels in the restaurant work here "Dalboka", which offers a menu of about 60 dishes prepared exclusively with the use of these shellfish. This is true even desserts. In addition, a beautiful view of the sea opens directly from the restaurant.

In Kavarna 2003 in early September, a festival of mussels and fish, guests are treated to a variety of seafood and beer. In addition, to create a festive atmosphere in the central square hosts concerts and dances.