As much as I understand the whole "Hard times" thing. It's just a thought this guy had. And yes People treat Pets as their kids. I know i do- we even have a word for it its called "Fids" Finned/Feathered or furry Kid) If you think fish are just fish then your wrong, many fish have been studied and are able to feel pain, and can think- unlike the "goldfish 3 second thoughts"- back in the day..lol
In the end it's not up to us whether he chooses to Sell or Eat the fish, he asked if it is possible to eat them.
people say you can, unless you have used medication or chemicals to treat the fish and the water. Peronally I love my pets and I would never eat them, but hey it's his choice who are we to mock him about it.