Vegans do not eat any animals or any food that is derived from animals. This means that vegans do not eat beef, pork, lamb, and other red meat. They also don't eat chicken, duck, and other poultry. And because fish are also living creatures, vegans don't eat fish or shellfish such as crabs, clams, and mussels.

The benefits of being a pescatarian might get you hooked. Pescatarians have a lot in common with vegetarians. They eat fruits, veggies, nuts, seeds, whole grains, beans, eggs, and dairy, and stay away from meat and poultry. But there's one way they part company from vegetarians: Pescatarians eat fish and other seafood.

The diet consists primarily of food made of plants: fruits and vegetables in addition to nuts, seeds, whole grains, and legumes. A plant-based diet is not a vegetarian or vegan diet; you can eat poultry, beef, eggs, fish, and dairy products, however most of your nutrient intake is coming from plant-based food sources.

Some people may also eat fish for its health benefits. Fish and seafood are rich in protein and provide numerous vitamins and minerals, including zinc and vitamin B12, which are vital for your immune and nervous systems. It can be difficult to get enough of these nutrients on a strict vegetarian diet ( 2 , 3, 4 ).