Why'd the fisherman order the halibut?

setup: Why’d the fisherman order the halibut?

[BILL] qua fisherman, ordering food I’d like the halibut.

[Shakes] qua Wendy’s employee Sir, this is a Wendy’s?

[BILL] Exactly, I’d like the halibut Baconator 2000, please.

[Shakes] Sir, I’m sorry but the Baconator does not come with halibut and, I have no idea where 2000 came from.

[BILL] OK. I’ll take the halibut baked potato.

[Shakes] No, there’s no halibut in the potatoes or anything else.

[BILL] Sardine frosty, maybe?

punchline: Just for the halibut.