THis is a very asian thing.
Unfortunately, generally speaking, asian countries regard animal welfare as one of the last priorities. Which is really quite funny, cos their main religions such as buddhism prohibits such animal cruelty yet they practice it daily
i have had many arguments on the arofanatics.com forum, predominantly asians there - keeping arowanas in 120x50x50 tanks! thinking its ok.
this is common.
i have seen large arowanas in 4 foot tanks with water only about 30 cm deep....
many of their beliefs in this regard is based largely on supestition and old wives tales.
This sort of practice is common, anything for 'good luck or good fortune'
asians are one of the easiest people to market to, all you gotta drop is FENG SHUI and something to do iwth money and happiness.
*disclaimer, i am asian myself and have a very good insight to this culture, so in case you label me racist, im immune to such things:)