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"Clean" and "unclean" refer to ancient Jewish customs governing the suitability of certain types of animals for eating and sacrifice. The distinction between which animals are "clean" and which are "unclean is somewhat complex, but, in general, "clean" animals are: [10] Quadrupeds that chew cud and possess a cloven hoof. Fish. Most birds, excluding birds of prey and most waterfowl. A few select types of vermin and insects.



Congratulations, you've built a modern-day ark based on the original specifications given to Noah by God! Now, all you need to do is find male-female pairs of every major species of bird and land animal to repopulate the Earth after the apocalyptic flood. However, according to the Bible, some animals are more important than others. Consider God's original advice to Noah when gathering animals: "Take with you seven pairs of every kind of clean animal, a male and its mate, and one pair of every kind of unclean animal, a male and its mate, and also seven pairs of every kind of bird, male and female, to keep their various kinds alive throughout the earth".