Does farmed salmon have parasites?

Chef's answer
Farmed salmon are fed on processed feed and treated with medicines to ward off disease and infestations such as sea lice, which can breed among the fish in the pens. The pens keep the fish enclosed but they allow parasites to get in and let thousands of tonnes of waste into the surrounding water.20 May 2019
Frequently asked Questions 🎓
Wild scallops are primarily harvested with dredges. Farmed scallops are grown with suspended systems and in bottom cultures. Note: Japanese scallops in the market are primarily farmed scallops.
Although farm-raised scallops are a good alternative because for health, nutrition and safety, both versions are similar and have equal benefits. Farm-raised are more environmentally safe because it prevents the decimation of the wild caught scallop population. So, like many people, you enjoy Scallops.
A 2004 study, found that the contaminants in farmed raised salmon are significantly higher in PBDE's which are toxins that bioaccumulate in the body and can cause a myriad of health issues. PBDEs have been associated with hormonal and thyroid disruption, brain damage and cancer.1 Oct 2018
Examining several slaughter techniques of farmed fish, scientific research has established that many methods presently employed are inhumane,12 including gill-cutting without prior stunning,13, asphyxiation in air or on ice,14,15 carbon-dioxide stunning,16 and live chilling.
A study warned against eating farmed tilapia because of its high ratio of omega-6 fats to heart-healthy omega-3 fats. Tilapia may not be as good as salmon or sardines for the heart, but it's still a good choice for dinner.
Wild salmon gets its distinctive pink flesh from a substance called astaxanthin, a pigment found in shrimp-like krill and other crustaceans that the salmon eats. The Four Corners program revealed that farmed fish are often fed a synthetic version of astaxanthin, without which they would be grey or off-white in colour.2 Nov 2016
Feeding. Scallops are filter feeders that are capable of ingesting living and inert particles suspended in the water column. In culture, scallop diets contain primarily phytoplankton that occur either naturally at a site or are produced artificially in culture.
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