Browsing around utchub I came across this interesting video. It shows what I would consider this a useful and remunerative business model for the Philippines.
I subscribe to Dexter's channel. It's "interesting" to see the different standards in quality between some Western fish retailers (Aquarium Co-op my favourite) and an independent Filipino retailer. He's been to all sorts of places and it's fascinating to see what some people can manage with a mud pond or empty shed. I'd be tempted to get the brother in laws on a bird breeding program, but I think it would end up costing me far more money than they would ever make as profit.