More than half of all people who are allergic to one type of fish are also allergic to other fish.

People who are allergic to fish are often advised by their doctor to avoid all fish.

Unexpected sources

Foods containing fish are not always easy to spot. Some unexpected sources of fish are:

• Ceasar salad or caesar dressing
• Worcestershire sauce
• Imitation or artificial fish or shellfish – eg surimi (also known as 'sea legs' or 'sea sticks')
• Meatloaf
• Barbecue sauce