1 Back problems. 2  Spine problems in the back near the lower ribs can pinch the nerves that travel through the groin area and cause groin and thigh pain. 3  Spine problems include a herniated disc or lumbar narrowing (stenosis).
Fish diets are determined by which organisms are readily available in the fish's habitat. Some larger fish eat smaller fish and sometimes are cannibalistic, eating smaller fish of their own species. Catfish in the wild swim along the bottom of rivers and eat dead fish, animal feces and just about anything they can find. Learn more about Fish
In terms of cost, it is likely fugu would become available in cheaper restaurants and pubs (izakayas). But going to a proper fugu restaurant to eat good wild-caught fish, prepared on-site, is quite a luxury - because of the cost, if nothing else - and also quite an event. For many, playing the equivalent of Russian roulette at the dinner table is the attraction of the dish.