a forever home for some of these larger fish we keep should be at least 3,000 litres maybe,
you need more than one of a kind to allow normal interaction within species
to feed properly you would need to supply a lot of live food
if we are releasing raised animals back to the wild we need to teach them to hunt proiperly so live food must be supplied, it does go against some peoples ethics though, but it is what is best for the animal.
luckily we live in a country were peoples personal opinions are respected