Thanks to Dale for sending this in, and saying “Is that fish supposed to be smoking? That doesn’t seem funny. Is it that it’s out of the bowl & sitting human fashion? Would that be funny? Are the other fish frowning or is that just resting fish face?”
Also I wondered, as did Dale, as did some commenters at goComics, whether this could have something to do with smoked fish.
That’s where the title about passive progressive comes in. It used to be that you weren’t supposed to say something like “Their house is being built currently”. And instead the recommended form was “Their house is a-building currently” or (slightly less eccentric sounding today) “Their house is building currently”. And by those rules, in place of “The fish is being smoked” you would have “The fish is smoking“. And voilà, here we have a picture of “The fish is smoking”.
Okay, in the spirit of supplementing the daily CIDU with entertaining musical clips, here is Cream doing “Strange Brew”: