Ethiopian cuisine
Both Ethiopian Orthodox Christians and Muslims avoid eating pork or shellfish, for religious reasons. Pork is considered to be unclean in both Ethiopian Orthodox Christianity and Islam. Many Ethiopians would abstain from eating certain meats, and would mostly eat vegetarian and vegan foods.
Kosher foods
The Talmud and Yoreh Deah suggest that eating meat and fish together may cause "tzaraath". Strictly Orthodox Jews thus avoid combining the two, while Conservative Jews may or may not.