Well most of those ive talked to from asia do use fresh or frozen chopped freshwater fish in their fish diet also. But one thing ive gotten from them and from my lil brother in japan is that goldfish are a very well liked fish in asia. And they just take better care of the feeders than we do my brother has been to shops with cleaner feeder tanks than some of the regular tanks at some of my LFS. Asians spend thousands on goldfish and just have better breeders and sources to get them than most of us. Look at how big and fat the feeders are in those vids, and compare those to the feeders at your LFS. Also found it funny one guy said scombs are more expensive than armatus where he is. I talk to a lot of asian FK because they are really the only ones i know who keep monster gobys and ive been getting a lot of good info from these guys on payaras