Bosses in Salt and Sanctuary are powerful enemies that are difficult to defeat. They have unique drops and can be found all through out the game.
The optional bosses will be marked with an asterisk (*). I tried rearranging the order to make it more accurate but the cite wouldn't carry over images or formatting. The bosses with asterisks are OPTIONAL but routing around them may be hard to do on your first run.
All SnS Bosses
Can only be fought once per save file as NG+ will start you directly on the beach