壽司現在是英國大小城市上班族的主要午餐選擇，附近隨便哪家餐廳或超市都在賣這種傳統日本美食。
But it turns out sushi may not be as wholesome3 a choice as we previously4 thought - leading biologists have warned that it is in fact harming both the environment and our health.
The UK sushi market is worth £69m a year, but because we're eating so much of it, tuna supplies in the oceans are dwindling5.
According to Professor Daniel Pauly and Dr Dirk Zeller, the leaders of the Sea Around Us project at the University of British Columbia, bluefin and yellowfin tuna populations have reached “crisis” levels.
Bluefin tuna tends to be served in high-end, luxury sushi restaurants, whereas yellowfin is more common in high-street sushi bars and supermarkets.
Increasing global demand means sushi populations are being overfished. Most of the UK's sushi comes from the Indian Ocean, but according to Professor Pauly we now only have 2-3 percent of what we had 200 years ago.
"We are in permanent crisis if you look at it in historic terms," he warned.
Professor Pauly and Dr Zeller believe it is our love of healthy tuna that's causing the problems in our oceans.
