In fact, the aforementioned criteria constitute a non-permit required confined space. A permit required confined space â more specifically, entrance to a permit required confined space â should be limited only to workers with the proper permit. This is due to the inherent hazards within this type of confined space.
Salmon farming is a type of aquaculture where the fish are grown in net cages, typically located in sheltered bays and fjords along the coast. Salmon are hatched in brood hatcheries and grown in freshwater until they are large enough to transfer to marine pens.
Salmon Farm Facts. 1  A salmon farm is likely to hold 500,000 to 750,000 fish in an area the size of four football fields. 2  The biomass of farmed salmon at one farm site can equal 480 Indian bull elephants â that is 2,400 tonnes of eating, excreting livestock. 3  Salmon are carnivores.