That... is interesting. Ginko watches with something like fascination; he'd kind of expected Joker to tear them up like he had to the whole fish, or at least chew them. Not... swallow the whole length of the intestines in one go. Do merpeople's gag reflexes not work like humans'? Assuming they have a gag reflex at all.

"Yeah. Guts." He'll stick with the shorter word from here. He eats the second slice of fish, and considers cutting more off. But... screw that, he absolutely doesn't have the patience to eat this thing bit by bit. He picks the fish up and bites into the exposed meat. Shit this mouthful of barely-prepared raw fish is way better than it should be. He pulls a couple bones out before mumbling through it, "Thanks."