After the Cataclysm, most food production changed radicaly. Because of the now constant Eclipse, most plant life that relied on sunlight has met the choice of dying out or radically adapting.
Mushrooms and Fungi have, for lack of a better word, Blossomed. Intelligent surface races have selectively grown different kinds of fungi to get a wide variety of shrooms for consumption.
Fishing has also become one of the most important sources of food as well.
To be continued.