I ran across a recipe (bouillabaisse) that calls for pastis, but grocery stores in my area don't carry pastis. Is there a substitute for pastis? Thank you!
Yes. In recipes like bouillabaisse, Pernod, Ouzo, Sambuca, or Ricard would all work as substitutes. Basically, almost any anise-flavored liqueur will work, although you might steer clear of high-alchohol ones like Raki.
If your local liquor selection is really poor, then maybe either skip it entirely, or add 1/4 tsp ground anise seed to the recipe and some dry white vermouth.
You could make cacciucco instead, which is similar but from farther down the coast (Viareggio/Livorno in Tuscany). Both dishes make use of local fish though, so I would expect that to be a bigger problem than finding pastis.