13 Types Of Fish You Should Think Twice About Before Buying

January 20, 2026 | Source: Tasting Table | by Greg Baker

We know that experts recommend adding fish to your diet to increase your heart health and slow the mental effects of aging, thanks to minerals, vitamins, and Omega-3 fatty acids. It’s also believed fish helps prenatal and natal cognitive and physical development. So, let’s eat more fish; but what’s stopping us?

Finding the right fish can be problematic when simultaneously trying to do right for yourself and the planet. We haven’t been kind to the marine environment, so consumers should avoid some fish for health reasons, such as high concentrations of heavy metals or other, more unseemly properties. In other cases, overfishing or questionable fishing techniques have put marine populations at risk. But the oceans are vast, and in many cases, a species overfished in one place has a healthy population elsewhere and vice versa. So, knowing what your fish is, where it came from, and how it was caught or farmed can help you make better purchasing decisions.