Feng Sushi sources its fish from sustainable suppliers. Mainly from the UK and where possible MSC (Marine Stewardship Council) approved. Think of hand dived scallops form the Ethical Shellfish on the Isle of Mull and salmon from Loch Duart. Or line caught yellow fin tuna from the Maldives and crab caught in Devon with the use of with crab pots.At the moment they have eight locations in London. The menu also offers veggie and gluten free options and you can order take away online. The sushi is delivered by bike. fengsushi.co.uk