People eat a variety of fish and animals. What is accepted to eat depends on religious, regional, and appetite influences. A common fish that is eaten is halibut. A less common animal is rabbit. Both are eaten, but one is more accepted than the other.
The guideline for eating these two creatures is the same. They can be eaten once every three weeks. Both have nutritional value and both have responsibilities. Nutritional value for all who eat them (not just people) and responsibilities in nature.
We need to remember that life on earth is not just for our enjoyment and for our sustenance. All creatures have a place, and one small place is nourishing humans.