Arctic char are growing in popularity because of their ability to thrive at low water temperatures. They are extremely hardy fish and grow better than Atlantic salmon and rainbow trout in cold-water conditions and high densities. They are a little more difficult to farm because they show a wide variation of growth rates when placed in different culture environments. This may be due to the fish's natural ability to adapt readily to changes in environmental conditions. They are commonly used in freshwater, but marine and brackish experimental farms are currently under way. Fresh, farmed charr is a new fish. It is considered a specialty item and gets higher prices than other commercialized salmonids such as Atlantic salmon and rainbow trout.