Yup, that's what you're eating when you eat sardines.
Well, you're eating the sardines too, but...
I love sardines! It's one of my favorite snacks. Nothing like a slice of dark rye bread piled high with sardines!
Good source of Omega 3 and so forth, and dare I add, also a good source of fish shit.
You didn't really think anybody guts and filets the little fuckers before they stuff them in that tin, did you?
Of course not!
So not only are you getting your daily dose of Omega 3; you're getting your daily dose of fish shit too!