Oily fish are a rich source of omega-3 fatty acids, which are essential for a healthy diet. Some examples of oily fish include:

  1. Salmon

  2. Tuna

  3. Sardines

  4. Herring

  5. Mackerel

  6. Trout

  7. Anchovies

  8. Pilchards

  9. Swordfish

  10. Eel

It's worth noting that some oily fish species can contain high levels of mercury and other contaminants, so it's important to consume them in moderation and choose sustainably sourced options where possible.