As my campaign is set primarily underwater, the party seldom has the opportunity to drop by a local tavern, for a bite to eat, or to the local provisioner, for standard rations.
Most of their rations are caught either by hunting (and catching a blue marlin with a trident is no easy task, I assure you) or foraging. However, on rare occasions when they are the guests of a local aquatic tribe, they have sampled fare such as inkwine, sweetsponge, fish wrapped in kelp (sushi), and certain soft corals.
Since we drylander are often fond of fishing, I devised "birding" for my Aquan races. They float a baited lasso to the surface, wait on a seagull to take the bait, and viola!