The future of fish farms??!

Wow, I've just read a very cool article!
For those who don't want to read it, the gist it that;

a: fish have a memory that spans months NOT 3 seconds! (Yes I have been telling you all that for years, but it has once again been proven)

b: fish can be trained to come when called, therefore meaning that they could be trained, then released into the wild and called back for periodic feeding and harvesting.

This means that fish farms could operate without cages, and the problems associated with them (concentrated pollution from one point, transfer of disease in confined spaces etc)
Pretty cool ehh??!
This means fish farming could go from looking like this:

To this:

This is pretty exciting! Although I'm sure issues of the 'ownership' of the fish, especially if they are out in the sea, could be a problem... Its a pretty cool idea though, especially if the farm is in a semi-contained place like the lochs in Scotland...

Bring on the future!!