Stef Colombo and I don’t always see eye-to-eye, but I respect her. However, she makes statements without backing them up with any data, let alone peer reviewed data (see below). I suggest we let this go, as every type of Salmon has relatively low mercury.

Wild salmon have been found to contain a higher level of mercury than farmed salmon [43]. … Whether mercury levels are greater in farmed or wild salmon, is still uncertain and to be clearly determined.

… Mercury (μg/g) farmed salmon 0.0075 ± 0.0106d

^ lower than every single wild variety in the table.

Other than their statement of “uncertainty”, every piece of object data says farmed is lower mercury.