It's all in the shape bud.. Forget the spots..
Id say the first fish is brown... The second, judging by the shape of it's head, looks to be a salar.
The third one is a brown. Again, the shape is a give-away.
Tony, I've just spoken to a pretty reliable source.. That fish you're holding, it's an atlantic. I owe you an apology. I'm the rube.