If tuna is hatched and raised in non-mercury containing water, does that make it mercury-free?

Question

Will heavy metals travel from parent to offspring? If not, why aren’t fish that contain heavy metals hatched in places where water can be monitored?

In: Biology

Answer 1

Tuna are an ocean predator, not some calm aquarium fish. You have to feed them fish, and those fish are how the tuna picks up mercury, not from the water they swim in.