Mercury in fish

Fish is a valuable source of omega-3 fats, but larger, longer-lived species such as shark (flake), swordfish, marlin and orange roughy accumulate mercury and should be limited when pregnant or planning pregnancy. Smaller species including salmon, sardines and most commonly eaten Australian fish can be eaten regularly.

Also known as: flake, fish to avoid, omega 3 fish

Last reviewed: 10 September 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.