Anincredible chirrup threadhas recently gone viral ,   foreground how the Pisces the Fishes we think we are buying may   not necessarily be the fish we cease up eating . Dr Jennifer McDonald , a prof of biological science at Fanshawe College in Canada , had her students sequence the   DNA of Pisces samples from restaurants and market , only to discover that the labels on the Pisces rarely   represent to the true   species .

The 16 scholar in Dr McDonald ’s course of study performed a test called polymerase chain reaction ( PCR ) , which is used to find a pocket-size amount of DNA in a sample distribution . They were able to press out DNA from 10   of the 13 sample , nine of which were fish . More on the non - fish one later .

From those nine , only two were really what they said they were : an Icelandic codfish that had a   marine stewardship certification ( MSC ) and a smoked rainbow trout . For   the impostor , there was tilapia that was substituted for both red-faced snapper and red tunny . Atlantic Salmon River plow out to be rainbow trout and an alleged sample of rainbow trout was coho Salmon River . Pacific pod was actuallyAtlantic cod . astonishingly , one sample of white tuna was really a yellowfin tuna , certainly an betterment .

The other sampling of white tunny was escolar , a tasty fish but one that has somedangerous side effects . The fish can not metabolise compound known as ester , which give it an oily texture . Too much of this Pisces the Fishes inhumanscan cause – brace yourself – explosive , oily , orange diarrhea .

If you thought that was the worst of it , please leave now . The tenth sample distribution was a mo of a whodunit . It was purchased as salmon from the seafood department , but the telephone number of base twain they were able-bodied to extract was   much depressed compared to the other   fish . Dr McDonald endeavor to clean the sample to no avail . It twist out ,   the belief   it was   a   Pisces the Fishes was a cherry-red herring . Do you desire to jazz what was in that sample ? According to her tests , it was   body louse .

intelligibly , it is concerning to have sex all this , but you do n’t have to go off Pisces the Fishes altogether . Dr McDonald has a simple opus of advice for   how to rust what you are actually buying : “ ensure it ’s from a license sustainable fishery . They know what they ’re fishing , and know what they ’re doing . ”

Hopefully , the   people who trade these mislabeled fishes take a long look at themselves and consider doing somesole searching !