What causes seafood poisoning?

Seafood poisoning is primarily caused by contaminated food or liquids, which can introduce harmful pathogens or toxins into the body. This contamination can come from various sources, including bacteria, viruses, or toxins produced by marine organisms. Consuming seafood that has been improperly handled, stored, or prepared increases the risk of encountering these contaminants, leading to foodborne illnesses.

While overcooked seafood and excessive consumption can certainly affect health, they are not direct causes of seafood poisoning. Overcooking might alter the texture and taste of seafood but does not necessarily eliminate harmful pathogens if they were present in the first place. Raw seafood can also pose risks, particularly if it's sourced from contaminated waters, but it is not the sole cause of seafood poisoning, as contamination can also occur in cooked seafood if it is not handled properly after cooking. Thus, the best answer reflects the primary cause of seafood poisoning as linked to contamination.