hey porl when i use to work at the qld fish markets a couple of tonne of catties come in from the bay, a trawler dragged em up and decided to put them through the markets for running costs. They were bought by a chinese fella who owned a very swish restaurant in Town, asked him why he bought them, he said, you want cod, mackeral, coral trout or any white flesh reef fish i have it, you want crab bait i have that too. he paid 8 cents a kilo, a fillet would bring around $6 in the restaurant back then with some lettuce, toms etc. crab bait returned him around 30 cents a kilo. it still happens.
cheers.