Overview

Pescetarianism describes a dietary pattern centered on vegetables, fruits, grains, legumes and other plant foods while deliberately including fish and other seafood as the animal-protein component. Some people who call themselves pescetarian also consume dairy and eggs (lacto-ovo pescetarians), while others avoid those foods. The label signals a primarily vegetarian approach with marine animal protein as an intentional exception and is used in dietary and cultural discussions alongside vegetarianism.

Typical foods and nutritional features

A typical pescetarian menu emphasizes whole plant foods plus aquatic sources of protein. Common items include:

  • Vegetables, fruits, whole grains, nuts, seeds and legumes.
  • Dairy products and eggs for those who include them.
  • Fish such as oily species (salmon, mackerel, sardines), smaller pelagics and a variety of crustaceans and mollusks broadly categorized as seafood.

Seafood can provide long-chain omega-3 fatty acids (EPA and DHA), high-quality protein and vitamin D. Plant foods supply fiber, folate, antioxidants and many micronutrients. Attention is commonly needed for vitamin B12, iron and iodine depending on the mix of foods and whether dairy, eggs or seafood are consumed regularly.

History and terminology

The modern term gained use in the late 20th century as people described hybrid diets that mixed vegetarian practices with fish consumption. While the word is relatively recent, many cultures have long included fish in diets that otherwise limit meat from land animals for religious, economic or environmental reasons.

Reasons people choose it

Motivations include health aims (for example, seeking fish-derived omega-3s), ethical concerns about industrial terrestrial livestock, taste preference for seafood, environmental considerations and cultural or religious traditions. Some adopt the pattern to reduce red and processed meat while retaining animal-based nutrients.

Health, sustainability and practical notes

Compared with diets high in red meat, many pescetarian patterns can be lower in saturated fat and higher in unsaturated fats. Risks to consider include exposure to contaminants such as mercury in certain large predatory fish and microplastics; pregnant people and young children are commonly advised to limit high‑mercury species. Sustainability varies by species and fishing or aquaculture method — consumers often choose smaller oily fish, certified sustainable sources, seasonal choices or farmed products from responsible systems to reduce environmental impact.

Distinctions and advice

Pescetarianism differs from strict vegetarianism by the deliberate inclusion of fish and other seafood. It is distinct from veganism and from flexible diets that include occasional meat. Those adopting the diet should plan meals to ensure adequate vitamin B12, iron and calcium if dairy and eggs are limited; when in doubt, consult a health professional or registered dietitian for personalized guidance.