I recently had the misfortune to try Butterfish at a restaurant in Vivocity (Singapore).
Why misfortune? Read the effects of consumption here.
Pretty gross right?
This fish is banned in Japan and Italy. If I had my way, I wish it was banned in Singapore too! Or at least, all menus with it should come with a very big warning so that consumers will be aware of the after effects of eating this not-that-fantastic fish.