How much sea water would be fatal if ingested?

Ingesting a large amount of sea water can be fatal due to its high salt content, which can lead to dehydration and electrolyte imbalances. The exact amount that would be fatal varies depending on factors such as a person's weight and health condition. In general, consuming more than 1-2 liters of sea water can be dangerous and potentially fatal. It is important to avoid drinking sea water and seek medical help if you accidentally ingest a significant amount.