What are the main predators of sea trout?

They have many natural predators at all stages of the life cycle, ranging from various fish-eating birds, eg. saw-billed ducks and terns, which attack the smolts gathering in lower rivers and estuaries and the post-smolts in their early life at sea, to gadoid fish such as pollack and cod and pelagic dogfish, then they must pass through areas frequently inhabited by common and grey seals. Back in fresh water, mink and otters take a proportion of sea trout, as occasionally do ospreys and, in some rivers, pike. Humans have the potential to take many more.