Kaldonta farm is located in the bay of the same name on the southwestern part of the island of Cres, in the Lošinj Channel, near the town of Punta Križa in the geographical position φ = 44° 38.0'N, λ = 014° 27.3'E. The bottom of the bay is characterized by a sandy bottom overgrown with grass. There are 44 floating cages measuring 5 x 10 m in the bay, which produce about 70 tons of white fish a year, mostly gilthead sea bream and European bass, while other species like sheephead bream and dentex are also grown. In Kaldonta Bay, various observations of physical and chemical indicators such as sea temperature, transparency and salinity were performed and special attention was paid to the qualitative system of network phytoplankton. According to all the obtained results, the investigated locality is a stable ecosystem, which is a guarantee for quality mariculture in the bay Kaldonta. The farm is managed by the company More-Lošinj doo with its headquarters in Mali Lošinj.