Fish can be a tasty snack for cats and can supplement their diet.
Risks
Fish is not part of a cat's natural diet and has little beneficial nutrients for them.
Some cats can be allergic to fish, showing signs of skin disease or digestive upsets.
Tuna, in particular, is high in mercury, which can lead to mercury buildup in the body, causing incoordination, loss of balance, and problems walking.
Suggestions
Feed fish to your cat occasionally and in moderation.
Monitor for any signs of allergies or mercury poisoning.
If any symptoms appear, contact a veterinary surgeon immediately.
Note: even if labeled as safe, any food can potentially cause allergies. When introducing a new food, please feed a small amount and observe your cat for any allergic reactions.