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The Flexitarian » Lifestyle » Eating In / Eating Out » Can seafood be part of a sustainable flexitarian diet?

Can seafood be part of a sustainable flexitarian diet?

Updated on October 14, 2026 by Guest Post Leave a Comment

Grilled garlic and herb prawns with lime wedges on a dark plate, part of a sustainable flexitarian diet

Eating more plant-based meals is one of the easiest ways to reduce our environmental footprint. But following a flexitarian diet doesn’t necessarily mean giving up animal products altogether. For many people, it is about eating less meat and fish while making more conscious choices about what ends up on their plates.

Seafood can occasionally feature in a flexitarian lifestyle, provided we consider where it comes from, how it is produced and its impact on marine ecosystems.

Finding Balance in a Flexitarian Lifestyle

The beauty of flexitarianism is its flexibility. Rather than following strict dietary rules, the emphasis is on eating more vegetables, legumes, whole grains and plant-based proteins while reducing animal product consumption.

As explained in this guide to the flexitarian diet, adopting a plant-focused lifestyle doesn’t require eliminating every animal product. Small, consistent changes can make a meaningful difference.

For those who occasionally enjoy fish or shellfish, responsible sourcing becomes particularly important. Choosing seafood thoughtfully can help align these occasional meals with broader environmental values.

Why Sustainable Seafood Choices Matter

Overfishing, habitat destruction and certain fishing practices put considerable pressure on marine ecosystems. However, not all seafood has the same environmental impact.

Some responsibly managed fisheries and well-regulated aquaculture operations offer better alternatives than poorly managed sources.

Farmed mussels and oysters, for example, can have a relatively low environmental footprint because they generally require no additional feed.

Nevertheless, sustainability depends on the species, location and production methods involved. Looking beyond simple sustainability claims is essential.

Seafood platter tower with lobster, prawns and oysters beside a plate of grilled prawns and glasses of white wine at a London restaurant

Exploring Responsible Seafood Dining in London

London’s diverse restaurant scene offers plenty of opportunities to explore different approaches to food.

For diners interested in seafood in London Soho, The Seafood Bar on Dean Street provides an example of a restaurant that places importance on ingredient quality and responsible sourcing.

The restaurant specialises in fresh fish, oysters and shellfish, working with suppliers to select seafood from responsible fisheries wherever possible. It also refers to sustainability guidance from organisations such as the Marine Conservation Society.

For flexitarians who occasionally choose seafood, understanding a restaurant’s sourcing approach is an important part of deciding where to eat.

Making Plant-based Foods The Centrepiece

Even when seafood is included in a meal, vegetables can remain the main attraction.

Think roasted seasonal vegetables, fresh salads, grilled asparagus or a colourful selection of Mediterranean-inspired side dishes.

A smaller serving of fish alongside generous portions of vegetables and whole grains can help maintain the plant-focused principles of flexitarian eating.

Eating out also provides an opportunity to try ingredients and combinations that might inspire new meat-free recipes at home.

Small Changes Can Make a Difference

Sustainable eating isn’t necessarily about perfection. It is about considering the environmental consequences of everyday choices.

Eating plant-based meals more frequently, reducing food waste and choosing responsibly sourced seafood when we do eat it are all practical steps.

Whether cooking at home or exploring London’s restaurant scene, a thoughtful approach to food allows flexitarians to enjoy variety while keeping sustainability at the heart of their choices.

A Collaborative Post 

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