Salmon run plankton. At this point the baby salmon are called "fry". At the end of the summer the fry develop into juvenile fish called "parr". Parr feed on small invertebrates and are camouflaged with a pattern of spots and vertical bars. They remain in this stage for up to three years. As they approach the time when they are ready to migrate out to the sea the parr lose their camouflage bars and undergo a process of physiological changes which allows them to survive the shift from freshwater to saltwater. At this point salmon are called "smolt". Smolt spend time in
Smoked salmon product. The sugar is hydrophilic, and also adds to the moistness of the smoked salmon. Salt and sugar are also preservatives, extending the storage life and freshness of the salmon. Table salt (iodized salt) is not used in any of these methods, as the iodine can impart a dark color and bitter taste to the fish. Indian hard smoked salmon is first kippered with salt, sugar and spices and then smoked until hard and jerky-like. See cured salmon. The Scandinavian dish gravlax is cured, but is not smoked. In British Columbia, canning salmon can be traced back to Alexander Loggie