In January, about 14,000 fish escaped from the Scottish Salmon Company (SSC)'s site in Geasgill.
A few days later Mowi Scotland reported around 74,000 salmon escaped from its site in Colonsay, after Storm Brendan battered the country.
Froy Shipping Company lost 14,000 smolts from its Halsbukta site early January, according to the Directorate of Fisheries statistics.
In Norway, around 3,000 fish escapes from Salmar's site in Western Finnmark in January, followed by a similar incident in February where the company lost more than 6,000 fish.
Norwegian producer Bjoroya suffered a salmon escape in April from its farm in Flatanger, in the north west of the country.
Mowi confirmed in an email a hole was discovered in a net at its Shaw Point farm in Canada West on May 24, which resulted in the escape of 1,000 juvenile salmon.
Mowi also reported a salmon escape from a Northern Norway site on June 16. The escape, in its Nordland region operation, was due to a hole -- 1 meter by 1 meter -- in one of the nets, according to the Directorate of Fisheries.
Chile's National Fisheries and Aquaculture Service (Sernapesca) estimated 103,720 salmon escaped from a site belonging to Chilean farmer Blumar in the Los Lagos region in June following a storm. The figure represents 12 percent of the 875,125 total salmon housed at the site.
Mowi Scotland confirmed 48,834 salmon escaped from its site at North Carradale as a result of Storm Ellen, which battered the UK coast with high winds and strong tides in August.
The Norwegian Directorate of Fisheries reported a salmon escape from SalMar's offshore salmon farming subsidiary Ocean Farming in August. Ocean Farming discovered a crack in the net on its sea cage after escaped farmed fish were caught in the area.
Chilean salmon farmer Salmones Camanchaca recaptured 1,268 out of the 124,309 salmon that escaped from its farm on Aug. 27, according to the country's National Fisheries and Aquaculture Service, Sernapesca. The event involved one cage of 500-gram fish at Camanchaca's San Jose site in the Los Lagos region.
SalMar in September discovered yet another crack in its offshore sea cage Ocean Farm 1, only a few weeks after a similar incident led to an escape from the site.
Up to 10,000 salmon with an average weight of 2.1 kilos went missing from one of Leroy's fish farms in September.
Huon Aquaculture reported an escape from its offshore salmon pens. The escape was discovered the morning of Dec. 2 with an estimated 120,000-130,000 half kilo fish escaping.

These were the biggest farmed salmon escapes of 2020