Hitra is a municipality and an island in Sør-Trøndelag county, Norway. The municipality covers the island of Hitra and several smaller islands, and is part of the Fosen region. It is the seventh largest island in mainland Norway, and a popular destination for boatpeople, fishermen, scuba- and free divers.
The waters off Norway is among the most productive in the world. An important reason is an abundance of phytoplankton, forming the base of the marine food chain. Like any plant, microscopic phytoplankton need sunlight and nutrients to survive. The long summers in Norway offers plenty of sunlight, resulting in a massive plankton bloom.
The heavy plankton bloom during the summer months limits the visibility in the water for scuba divers. However, as days get shorter the phytoplankton dies down and the water clears up offering prime diving conditions if you don’t mind the cold water.