Seafood stocks listed on the Oslo Stock Exchange saw average increases of 18.9 percent in 2019.

While the sharpest climber nearly tripled in value and three stocks fell in price, the seafood index, which includes the most traded seafood stocks, rose slightly more than the broad main index.

The year's star performer among the seafood companies was the biotechnology company Hofseth Biocare, which processes by-products of salmon and trout for various products.

With an increase of as much as 270 percent, the share was actually the fourth best of all shares listed on the Oslo Stock Exchange's various trading platforms.