It’s mostly illegal to farm it in Taiwan
http://focustaiwan.tw/news/asoc/201402250031.aspx
It’s been infected with an unknown first time never seen before in the species or world disease after being introduced into Taiwan http://focustaiwan.tw/news/asoc/201402250031.aspx
And it’s mostly raised (illicitly) in Changhua City, Touwu Township, Gongguan Township and Ligang Township. Which are places with huge amounts of air, land, water pollution.
Yuck.
Taiwan is a “fishless island” anyway according to the Fisheries Agency. Most seafood is imported. There is no local unique seafood anywhere in Taiwan except Penghu.
Taiwan the "fishless" island