Worst: Orange Roughy
These fish, also known as slimeheads, can live up to 150 years. But that means they've been around unhealthy elements, like mercury, for a long time. So they're not the best option for a healthy diet.
Why should I not eat orange roughy?
A fish filled with a century of toxins
Due to the fish's long lifespan, orange roughies have the potential to accumulate a ton of toxins. According to One Medical, orange roughies contain large amounts of mercury that have led the Environmental Defense Fund (EDF) to issue an advisory against consuming this fish.
Can orange roughy make you sick?
1 Some 90% of this oil is indigestible wax esters (gempylotoxin), which can cause diarrhoea and other acute gastro-intestinal symptoms, including abdominal cramps, nausea, headaches, and vomiting.