Can eating fried fish in grape seed oil or olive oil daily be healthy?

My mother-in-law swears that as long as you eat fish fried daily, in certain types of oil, paired with red wine and a salad with any dressing on the side, will keep us healthy and trim. My husband is up for it, I’m not convinced. Oh yeah, she flours the fish, if this makes a difference in the answer.

Fish is actually not good for you.
Think Fish Is a Health Food? Think Again
Fish live in water that is so polluted, you would never dream of drinking it. But you’re ingesting this
toxic brew—bacteria, contaminants, heavy metals, and all—every time you eat fish.
Fish’s bodies absorb toxic chemicals in the water around them, and the chemicals become more
concentrated as they move up the food chain. Big fish eat little fish, with the bigger fish (such as tuna
and salmon) absorbing chemicals from all the other fish they eat. Fish flesh stores contaminants, such as
PCBs, which cause liver damage, nervous system disorders, and fetal damage; dioxins, also linked to
cancer; radioactive substances like strontium 90; and other
dangerous contaminants like cadmium, mercury, lead, chromium,
and arsenic, which can cause health problems ranging from
kidney damage and impaired mental development to cancer.1,2,3,4
These toxins are stored in the body fat of humans who eat fish
and remain in their bodies for decades.

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